diff --git a/auth_test.go b/auth_test.go
index dc8523b..ab7e94b 100644
--- a/auth_test.go
+++ b/auth_test.go
@@ -93,7 +93,7 @@ func TestBasicAuthSucceed(t *testing.T) {
 	router := New()
 	router.Use(BasicAuth(accounts))
 	router.GET("/login", func(c *Context) {
-		c.String(200, c.MustGet(AuthUserKey).(string))
+		c.String(http.StatusOK, c.MustGet(AuthUserKey).(string))
 	})
 
 	w := httptest.NewRecorder()
@@ -101,7 +101,7 @@ func TestBasicAuthSucceed(t *testing.T) {
 	req.Header.Set("Authorization", authorizationHeader("admin", "password"))
 	router.ServeHTTP(w, req)
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "admin", w.Body.String())
 }
 
@@ -112,7 +112,7 @@ func TestBasicAuth401(t *testing.T) {
 	router.Use(BasicAuth(accounts))
 	router.GET("/login", func(c *Context) {
 		called = true
-		c.String(200, c.MustGet(AuthUserKey).(string))
+		c.String(http.StatusOK, c.MustGet(AuthUserKey).(string))
 	})
 
 	w := httptest.NewRecorder()
@@ -121,7 +121,7 @@ func TestBasicAuth401(t *testing.T) {
 	router.ServeHTTP(w, req)
 
 	assert.False(t, called)
-	assert.Equal(t, 401, w.Code)
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
 	assert.Equal(t, "Basic realm=\"Authorization Required\"", w.HeaderMap.Get("WWW-Authenticate"))
 }
 
@@ -132,7 +132,7 @@ func TestBasicAuth401WithCustomRealm(t *testing.T) {
 	router.Use(BasicAuthForRealm(accounts, "My Custom \"Realm\""))
 	router.GET("/login", func(c *Context) {
 		called = true
-		c.String(200, c.MustGet(AuthUserKey).(string))
+		c.String(http.StatusOK, c.MustGet(AuthUserKey).(string))
 	})
 
 	w := httptest.NewRecorder()
@@ -141,6 +141,6 @@ func TestBasicAuth401WithCustomRealm(t *testing.T) {
 	router.ServeHTTP(w, req)
 
 	assert.False(t, called)
-	assert.Equal(t, 401, w.Code)
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
 	assert.Equal(t, "Basic realm=\"My Custom \\\"Realm\\\"\"", w.HeaderMap.Get("WWW-Authenticate"))
 }
diff --git a/benchmarks_test.go b/benchmarks_test.go
index e797003..0b3f82d 100644
--- a/benchmarks_test.go
+++ b/benchmarks_test.go
@@ -54,7 +54,7 @@ func BenchmarkOneRouteJSON(B *testing.B) {
 		Status string `json:"status"`
 	}{"ok"}
 	router.GET("/json", func(c *Context) {
-		c.JSON(200, data)
+		c.JSON(http.StatusOK, data)
 	})
 	runRequest(B, router, "GET", "/json")
 }
@@ -66,7 +66,7 @@ func BenchmarkOneRouteHTML(B *testing.B) {
 	router.SetHTMLTemplate(t)
 
 	router.GET("/html", func(c *Context) {
-		c.HTML(200, "index", "hola")
+		c.HTML(http.StatusOK, "index", "hola")
 	})
 	runRequest(B, router, "GET", "/html")
 }
@@ -82,7 +82,7 @@ func BenchmarkOneRouteSet(B *testing.B) {
 func BenchmarkOneRouteString(B *testing.B) {
 	router := New()
 	router.GET("/text", func(c *Context) {
-		c.String(200, "this is a plain text")
+		c.String(http.StatusOK, "this is a plain text")
 	})
 	runRequest(B, router, "GET", "/text")
 }
diff --git a/context_test.go b/context_test.go
index 0185507..99d5267 100644
--- a/context_test.go
+++ b/context_test.go
@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
+	"io"
 	"mime/multipart"
 	"net/http"
 	"net/http/httptest"
@@ -21,7 +22,6 @@ import (
 	"github.com/gin-gonic/gin/binding"
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/net/context"
-	"io"
 )
 
 var _ context.Context = &Context{}
@@ -585,10 +585,11 @@ func TestContextGetCookie(t *testing.T) {
 }
 
 func TestContextBodyAllowedForStatus(t *testing.T) {
+	// todo(thinkerou): go1.6 not support StatusProcessing
 	assert.False(t, false, bodyAllowedForStatus(102))
-	assert.False(t, false, bodyAllowedForStatus(204))
-	assert.False(t, false, bodyAllowedForStatus(304))
-	assert.True(t, true, bodyAllowedForStatus(500))
+	assert.False(t, false, bodyAllowedForStatus(http.StatusNoContent))
+	assert.False(t, false, bodyAllowedForStatus(http.StatusNotModified))
+	assert.True(t, true, bodyAllowedForStatus(http.StatusInternalServerError))
 }
 
 type TestPanicRender struct {
@@ -619,9 +620,9 @@ func TestContextRenderJSON(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.JSON(201, H{"foo": "bar"})
+	c.JSON(http.StatusCreated, H{"foo": "bar"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -633,9 +634,9 @@ func TestContextRenderJSONP(t *testing.T) {
 	c, _ := CreateTestContext(w)
 	c.Request, _ = http.NewRequest("GET", "http://example.com/?callback=x", nil)
 
-	c.JSONP(201, H{"foo": "bar"})
+	c.JSONP(http.StatusCreated, H{"foo": "bar"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "x({\"foo\":\"bar\"})", w.Body.String())
 	assert.Equal(t, "application/javascript; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -647,9 +648,9 @@ func TestContextRenderJSONPWithoutCallback(t *testing.T) {
 	c, _ := CreateTestContext(w)
 	c.Request, _ = http.NewRequest("GET", "http://example.com", nil)
 
-	c.JSONP(201, H{"foo": "bar"})
+	c.JSONP(http.StatusCreated, H{"foo": "bar"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -659,9 +660,9 @@ func TestContextRenderNoContentJSON(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.JSON(204, H{"foo": "bar"})
+	c.JSON(http.StatusNoContent, H{"foo": "bar"})
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -673,9 +674,9 @@ func TestContextRenderAPIJSON(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	c.Header("Content-Type", "application/vnd.api+json")
-	c.JSON(201, H{"foo": "bar"})
+	c.JSON(http.StatusCreated, H{"foo": "bar"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/vnd.api+json", w.HeaderMap.Get("Content-Type"))
 }
@@ -686,9 +687,9 @@ func TestContextRenderNoContentAPIJSON(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	c.Header("Content-Type", "application/vnd.api+json")
-	c.JSON(204, H{"foo": "bar"})
+	c.JSON(http.StatusNoContent, H{"foo": "bar"})
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, w.HeaderMap.Get("Content-Type"), "application/vnd.api+json")
 }
@@ -699,9 +700,9 @@ func TestContextRenderIndentedJSON(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.IndentedJSON(201, H{"foo": "bar", "bar": "foo", "nested": H{"foo": "bar"}})
+	c.IndentedJSON(http.StatusCreated, H{"foo": "bar", "bar": "foo", "nested": H{"foo": "bar"}})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "{\n    \"bar\": \"foo\",\n    \"foo\": \"bar\",\n    \"nested\": {\n        \"foo\": \"bar\"\n    }\n}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -711,9 +712,9 @@ func TestContextRenderNoContentIndentedJSON(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.IndentedJSON(204, H{"foo": "bar", "bar": "foo", "nested": H{"foo": "bar"}})
+	c.IndentedJSON(http.StatusNoContent, H{"foo": "bar", "bar": "foo", "nested": H{"foo": "bar"}})
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -725,9 +726,9 @@ func TestContextRenderSecureJSON(t *testing.T) {
 	c, router := CreateTestContext(w)
 
 	router.SecureJsonPrefix("&&&START&&&")
-	c.SecureJSON(201, []string{"foo", "bar"})
+	c.SecureJSON(http.StatusCreated, []string{"foo", "bar"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "&&&START&&&[\"foo\",\"bar\"]", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -737,9 +738,9 @@ func TestContextRenderNoContentSecureJSON(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.SecureJSON(204, []string{"foo", "bar"})
+	c.SecureJSON(http.StatusNoContent, []string{"foo", "bar"})
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -764,9 +765,9 @@ func TestContextRenderHTML(t *testing.T) {
 	templ := template.Must(template.New("t").Parse(`Hello {{.name}}`))
 	router.SetHTMLTemplate(templ)
 
-	c.HTML(201, "t", H{"name": "alexandernyquist"})
+	c.HTML(http.StatusCreated, "t", H{"name": "alexandernyquist"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "Hello alexandernyquist", w.Body.String())
 	assert.Equal(t, "text/html; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -788,9 +789,9 @@ func TestContextRenderHTML2(t *testing.T) {
 
 	assert.Equal(t, "[GIN-debug] [WARNING] Since SetHTMLTemplate() is NOT thread-safe. It should only be called\nat initialization. ie. before any route is registered or the router is listening in a socket:\n\n\trouter := gin.Default()\n\trouter.SetHTMLTemplate(template) // << good place\n\n", b.String())
 
-	c.HTML(201, "t", H{"name": "alexandernyquist"})
+	c.HTML(http.StatusCreated, "t", H{"name": "alexandernyquist"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "Hello alexandernyquist", w.Body.String())
 	assert.Equal(t, "text/html; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -802,9 +803,9 @@ func TestContextRenderNoContentHTML(t *testing.T) {
 	templ := template.Must(template.New("t").Parse(`Hello {{.name}}`))
 	router.SetHTMLTemplate(templ)
 
-	c.HTML(204, "t", H{"name": "alexandernyquist"})
+	c.HTML(http.StatusNoContent, "t", H{"name": "alexandernyquist"})
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "text/html; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -815,9 +816,9 @@ func TestContextRenderXML(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.XML(201, H{"foo": "bar"})
+	c.XML(http.StatusCreated, H{"foo": "bar"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "<map><foo>bar</foo></map>", w.Body.String())
 	assert.Equal(t, "application/xml; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -827,9 +828,9 @@ func TestContextRenderNoContentXML(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.XML(204, H{"foo": "bar"})
+	c.XML(http.StatusNoContent, H{"foo": "bar"})
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "application/xml; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -840,9 +841,9 @@ func TestContextRenderString(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.String(201, "test %s %d", "string", 2)
+	c.String(http.StatusCreated, "test %s %d", "string", 2)
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "test string 2", w.Body.String())
 	assert.Equal(t, "text/plain; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -852,9 +853,9 @@ func TestContextRenderNoContentString(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.String(204, "test %s %d", "string", 2)
+	c.String(http.StatusNoContent, "test %s %d", "string", 2)
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "text/plain; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -866,9 +867,9 @@ func TestContextRenderHTMLString(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	c.Header("Content-Type", "text/html; charset=utf-8")
-	c.String(201, "<html>%s %d</html>", "string", 3)
+	c.String(http.StatusCreated, "<html>%s %d</html>", "string", 3)
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "<html>string 3</html>", w.Body.String())
 	assert.Equal(t, "text/html; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -879,9 +880,9 @@ func TestContextRenderNoContentHTMLString(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	c.Header("Content-Type", "text/html; charset=utf-8")
-	c.String(204, "<html>%s %d</html>", "string", 3)
+	c.String(http.StatusNoContent, "<html>%s %d</html>", "string", 3)
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "text/html; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -892,9 +893,9 @@ func TestContextRenderData(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.Data(201, "text/csv", []byte(`foo,bar`))
+	c.Data(http.StatusCreated, "text/csv", []byte(`foo,bar`))
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "foo,bar", w.Body.String())
 	assert.Equal(t, "text/csv", w.HeaderMap.Get("Content-Type"))
 }
@@ -904,9 +905,9 @@ func TestContextRenderNoContentData(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.Data(204, "text/csv", []byte(`foo,bar`))
+	c.Data(http.StatusNoContent, "text/csv", []byte(`foo,bar`))
 
-	assert.Equal(t, 204, w.Code)
+	assert.Equal(t, http.StatusNoContent, w.Code)
 	assert.Empty(t, w.Body.String())
 	assert.Equal(t, "text/csv", w.HeaderMap.Get("Content-Type"))
 }
@@ -935,7 +936,7 @@ func TestContextRenderFile(t *testing.T) {
 	c.Request, _ = http.NewRequest("GET", "/", nil)
 	c.File("./gin.go")
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Contains(t, w.Body.String(), "func New() *Engine {")
 	assert.Equal(t, "text/plain; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -946,9 +947,9 @@ func TestContextRenderYAML(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.YAML(201, H{"foo": "bar"})
+	c.YAML(http.StatusCreated, H{"foo": "bar"})
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "foo: bar\n", w.Body.String())
 	assert.Equal(t, "application/x-yaml; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -978,9 +979,9 @@ func TestContextRenderRedirectWithRelativePath(t *testing.T) {
 	assert.Panics(t, func() { c.Redirect(299, "/new_path") })
 	assert.Panics(t, func() { c.Redirect(309, "/new_path") })
 
-	c.Redirect(301, "/path")
+	c.Redirect(http.StatusMovedPermanently, "/path")
 	c.Writer.WriteHeaderNow()
-	assert.Equal(t, 301, w.Code)
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
 	assert.Equal(t, "/path", w.Header().Get("Location"))
 }
 
@@ -989,10 +990,10 @@ func TestContextRenderRedirectWithAbsolutePath(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	c.Request, _ = http.NewRequest("POST", "http://example.com", nil)
-	c.Redirect(302, "http://google.com")
+	c.Redirect(http.StatusFound, "http://google.com")
 	c.Writer.WriteHeaderNow()
 
-	assert.Equal(t, 302, w.Code)
+	assert.Equal(t, http.StatusFound, w.Code)
 	assert.Equal(t, "http://google.com", w.Header().Get("Location"))
 }
 
@@ -1001,21 +1002,23 @@ func TestContextRenderRedirectWith201(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	c.Request, _ = http.NewRequest("POST", "http://example.com", nil)
-	c.Redirect(201, "/resource")
+	c.Redirect(http.StatusCreated, "/resource")
 	c.Writer.WriteHeaderNow()
 
-	assert.Equal(t, 201, w.Code)
+	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "/resource", w.Header().Get("Location"))
 }
 
 func TestContextRenderRedirectAll(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	c.Request, _ = http.NewRequest("POST", "http://example.com", nil)
-	assert.Panics(t, func() { c.Redirect(200, "/resource") })
-	assert.Panics(t, func() { c.Redirect(202, "/resource") })
+	assert.Panics(t, func() { c.Redirect(http.StatusOK, "/resource") })
+	assert.Panics(t, func() { c.Redirect(http.StatusAccepted, "/resource") })
 	assert.Panics(t, func() { c.Redirect(299, "/resource") })
 	assert.Panics(t, func() { c.Redirect(309, "/resource") })
-	assert.NotPanics(t, func() { c.Redirect(300, "/resource") })
+	assert.NotPanics(t, func() { c.Redirect(http.StatusMultipleChoices, "/resource") })
+	// todo(thinkerou): go1.6 not support StatusPermanentRedirect(308)
+	// when we upgrade go version we can use http.StatusPermanentRedirect
 	assert.NotPanics(t, func() { c.Redirect(308, "/resource") })
 }
 
@@ -1024,12 +1027,12 @@ func TestContextNegotiationWithJSON(t *testing.T) {
 	c, _ := CreateTestContext(w)
 	c.Request, _ = http.NewRequest("POST", "", nil)
 
-	c.Negotiate(200, Negotiate{
+	c.Negotiate(http.StatusOK, Negotiate{
 		Offered: []string{MIMEJSON, MIMEXML},
 		Data:    H{"foo": "bar"},
 	})
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "{\"foo\":\"bar\"}", w.Body.String())
 	assert.Equal(t, "application/json; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -1039,12 +1042,12 @@ func TestContextNegotiationWithXML(t *testing.T) {
 	c, _ := CreateTestContext(w)
 	c.Request, _ = http.NewRequest("POST", "", nil)
 
-	c.Negotiate(200, Negotiate{
+	c.Negotiate(http.StatusOK, Negotiate{
 		Offered: []string{MIMEXML, MIMEJSON},
 		Data:    H{"foo": "bar"},
 	})
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "<map><foo>bar</foo></map>", w.Body.String())
 	assert.Equal(t, "application/xml; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -1056,13 +1059,13 @@ func TestContextNegotiationWithHTML(t *testing.T) {
 	templ := template.Must(template.New("t").Parse(`Hello {{.name}}`))
 	router.SetHTMLTemplate(templ)
 
-	c.Negotiate(200, Negotiate{
+	c.Negotiate(http.StatusOK, Negotiate{
 		Offered:  []string{MIMEHTML},
 		Data:     H{"name": "gin"},
 		HTMLName: "t",
 	})
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "Hello gin", w.Body.String())
 	assert.Equal(t, "text/html; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -1072,11 +1075,11 @@ func TestContextNegotiationNotSupport(t *testing.T) {
 	c, _ := CreateTestContext(w)
 	c.Request, _ = http.NewRequest("POST", "", nil)
 
-	c.Negotiate(200, Negotiate{
+	c.Negotiate(http.StatusOK, Negotiate{
 		Offered: []string{MIMEPOSTForm},
 	})
 
-	assert.Equal(t, 406, w.Code)
+	assert.Equal(t, http.StatusNotAcceptable, w.Code)
 	assert.Equal(t, c.index, abortIndex)
 	assert.True(t, c.IsAborted())
 }
@@ -1134,11 +1137,11 @@ func TestContextAbortWithStatus(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	c.index = 4
-	c.AbortWithStatus(401)
+	c.AbortWithStatus(http.StatusUnauthorized)
 
 	assert.Equal(t, abortIndex, c.index)
-	assert.Equal(t, 401, c.Writer.Status())
-	assert.Equal(t, 401, w.Code)
+	assert.Equal(t, http.StatusUnauthorized, c.Writer.Status())
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
 	assert.True(t, c.IsAborted())
 }
 
@@ -1156,11 +1159,11 @@ func TestContextAbortWithStatusJSON(t *testing.T) {
 	in.Bar = "barValue"
 	in.Foo = "fooValue"
 
-	c.AbortWithStatusJSON(415, in)
+	c.AbortWithStatusJSON(http.StatusUnsupportedMediaType, in)
 
 	assert.Equal(t, abortIndex, c.index)
-	assert.Equal(t, 415, c.Writer.Status())
-	assert.Equal(t, 415, w.Code)
+	assert.Equal(t, http.StatusUnsupportedMediaType, c.Writer.Status())
+	assert.Equal(t, http.StatusUnsupportedMediaType, w.Code)
 	assert.True(t, c.IsAborted())
 
 	contentType := w.Header().Get("Content-Type")
@@ -1223,9 +1226,9 @@ func TestContextAbortWithError(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
 
-	c.AbortWithError(401, errors.New("bad input")).SetMeta("some input")
+	c.AbortWithError(http.StatusUnauthorized, errors.New("bad input")).SetMeta("some input")
 
-	assert.Equal(t, 401, w.Code)
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
 	assert.Equal(t, abortIndex, c.index)
 	assert.True(t, c.IsAborted())
 }
@@ -1333,7 +1336,7 @@ func TestContextBadAutoBind(t *testing.T) {
 
 	assert.Empty(t, obj.Bar)
 	assert.Empty(t, obj.Foo)
-	assert.Equal(t, 400, w.Code)
+	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.True(t, c.IsAborted())
 }
 
diff --git a/examples/basic/main.go b/examples/basic/main.go
index 473c6a0..48fa7bb 100644
--- a/examples/basic/main.go
+++ b/examples/basic/main.go
@@ -1,6 +1,8 @@
 package main
 
 import (
+	"net/http"
+
 	"github.com/gin-gonic/gin"
 )
 
@@ -13,7 +15,7 @@ func setupRouter() *gin.Engine {
 
 	// Ping test
 	r.GET("/ping", func(c *gin.Context) {
-		c.String(200, "pong")
+		c.String(http.StatusOK, "pong")
 	})
 
 	// Get user value
@@ -21,9 +23,9 @@ func setupRouter() *gin.Engine {
 		user := c.Params.ByName("name")
 		value, ok := DB[user]
 		if ok {
-			c.JSON(200, gin.H{"user": user, "value": value})
+			c.JSON(http.StatusOK, gin.H{"user": user, "value": value})
 		} else {
-			c.JSON(200, gin.H{"user": user, "status": "no value"})
+			c.JSON(http.StatusOK, gin.H{"user": user, "status": "no value"})
 		}
 	})
 
@@ -49,7 +51,7 @@ func setupRouter() *gin.Engine {
 
 		if c.Bind(&json) == nil {
 			DB[user] = json.Value
-			c.JSON(200, gin.H{"status": "ok"})
+			c.JSON(http.StatusOK, gin.H{"status": "ok"})
 		}
 	})
 
diff --git a/examples/basic/main_test.go b/examples/basic/main_test.go
index 61203d6..5eb8524 100644
--- a/examples/basic/main_test.go
+++ b/examples/basic/main_test.go
@@ -15,6 +15,6 @@ func TestPingRoute(t *testing.T) {
 	req, _ := http.NewRequest("GET", "/ping", nil)
 	router.ServeHTTP(w, req)
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "pong", w.Body.String())
 }
diff --git a/examples/favicon/main.go b/examples/favicon/main.go
index 5ad3933..d32ca09 100644
--- a/examples/favicon/main.go
+++ b/examples/favicon/main.go
@@ -1,6 +1,8 @@
 package main
 
 import (
+	"net/http"
+
 	"github.com/gin-gonic/gin"
 	"github.com/thinkerou/favicon"
 )
@@ -9,7 +11,7 @@ func main() {
 	app := gin.Default()
 	app.Use(favicon.New("./favicon.ico"))
 	app.GET("/ping", func(c *gin.Context) {
-		c.String(200, "Hello favicon.")
+		c.String(http.StatusOK, "Hello favicon.")
 	})
 	app.Run(":8080")
 }
diff --git a/examples/http2/main.go b/examples/http2/main.go
index 07df01e..6598a4c 100644
--- a/examples/http2/main.go
+++ b/examples/http2/main.go
@@ -3,6 +3,7 @@ package main
 import (
 	"html/template"
 	"log"
+	"net/http"
 	"os"
 
 	"github.com/gin-gonic/gin"
@@ -27,7 +28,7 @@ func main() {
 	r.SetHTMLTemplate(html)
 
 	r.GET("/welcome", func(c *gin.Context) {
-		c.HTML(200, "https", gin.H{
+		c.HTML(http.StatusOK, "https", gin.H{
 			"status": "success",
 		})
 	})
diff --git a/examples/realtime-advanced/routes.go b/examples/realtime-advanced/routes.go
index 86da9be..03c6991 100644
--- a/examples/realtime-advanced/routes.go
+++ b/examples/realtime-advanced/routes.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"html"
 	"io"
+	"net/http"
 	"strings"
 	"time"
 
@@ -21,12 +22,12 @@ func rateLimit(c *gin.Context) {
 			fmt.Println("ip blocked")
 		}
 		c.Abort()
-		c.String(503, "you were automatically banned :)")
+		c.String(http.StatusServiceUnavailable, "you were automatically banned :)")
 	}
 }
 
 func index(c *gin.Context) {
-	c.Redirect(301, "/room/hn")
+	c.Redirect(http.StatusMovedPermanently, "/room/hn")
 }
 
 func roomGET(c *gin.Context) {
@@ -38,7 +39,7 @@ func roomGET(c *gin.Context) {
 	if len(nick) > 13 {
 		nick = nick[0:12] + "..."
 	}
-	c.HTML(200, "room_login.templ.html", gin.H{
+	c.HTML(http.StatusOK, "room_login.templ.html", gin.H{
 		"roomid":    roomid,
 		"nick":      nick,
 		"timestamp": time.Now().Unix(),
@@ -55,7 +56,7 @@ func roomPOST(c *gin.Context) {
 	validMessage := len(message) > 1 && len(message) < 200
 	validNick := len(nick) > 1 && len(nick) < 14
 	if !validMessage || !validNick {
-		c.JSON(400, gin.H{
+		c.JSON(http.StatusBadRequest, gin.H{
 			"status": "failed",
 			"error":  "the message or nickname is too long",
 		})
@@ -68,7 +69,7 @@ func roomPOST(c *gin.Context) {
 	}
 	messages.Add("inbound", 1)
 	room(roomid).Submit(post)
-	c.JSON(200, post)
+	c.JSON(http.StatusOK, post)
 }
 
 func streamRoom(c *gin.Context) {
diff --git a/examples/realtime-chat/main.go b/examples/realtime-chat/main.go
index e4b55a0..5741fcb 100644
--- a/examples/realtime-chat/main.go
+++ b/examples/realtime-chat/main.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"math/rand"
+	"net/http"
 
 	"github.com/gin-gonic/gin"
 )
@@ -34,7 +35,7 @@ func stream(c *gin.Context) {
 func roomGET(c *gin.Context) {
 	roomid := c.Param("roomid")
 	userid := fmt.Sprint(rand.Int31())
-	c.HTML(200, "chat_room", gin.H{
+	c.HTML(http.StatusOK, "chat_room", gin.H{
 		"roomid": roomid,
 		"userid": userid,
 	})
@@ -46,7 +47,7 @@ func roomPOST(c *gin.Context) {
 	message := c.PostForm("message")
 	room(roomid).Submit(userid + ": " + message)
 
-	c.JSON(200, gin.H{
+	c.JSON(http.StatusOK, gin.H{
 		"status":  "success",
 		"message": message,
 	})
diff --git a/githubapi_test.go b/githubapi_test.go
index a08c264..f631035 100644
--- a/githubapi_test.go
+++ b/githubapi_test.go
@@ -293,7 +293,7 @@ func githubConfigRouter(router *Engine) {
 			for _, param := range c.Params {
 				output[param.Key] = param.Value
 			}
-			c.JSON(200, output)
+			c.JSON(http.StatusOK, output)
 		})
 	}
 }
diff --git a/logger.go b/logger.go
index c679c78..1a8df60 100644
--- a/logger.go
+++ b/logger.go
@@ -7,6 +7,7 @@ package gin
 import (
 	"fmt"
 	"io"
+	"net/http"
 	"os"
 	"time"
 
@@ -118,11 +119,11 @@ func LoggerWithWriter(out io.Writer, notlogged ...string) HandlerFunc {
 
 func colorForStatus(code int) string {
 	switch {
-	case code >= 200 && code < 300:
+	case code >= http.StatusOK && code < http.StatusMultipleChoices:
 		return green
-	case code >= 300 && code < 400:
+	case code >= http.StatusMultipleChoices && code < http.StatusBadRequest:
 		return white
-	case code >= 400 && code < 500:
+	case code >= http.StatusBadRequest && code < http.StatusInternalServerError:
 		return yellow
 	default:
 		return red
diff --git a/logger_test.go b/logger_test.go
index 74a9659..7dbbf7b 100644
--- a/logger_test.go
+++ b/logger_test.go
@@ -7,6 +7,7 @@ package gin
 import (
 	"bytes"
 	"errors"
+	"net/http"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -93,9 +94,9 @@ func TestColorForMethod(t *testing.T) {
 }
 
 func TestColorForStatus(t *testing.T) {
-	assert.Equal(t, string([]byte{27, 91, 57, 55, 59, 52, 50, 109}), colorForStatus(200), "2xx should be green")
-	assert.Equal(t, string([]byte{27, 91, 57, 48, 59, 52, 55, 109}), colorForStatus(301), "3xx should be white")
-	assert.Equal(t, string([]byte{27, 91, 57, 55, 59, 52, 51, 109}), colorForStatus(404), "4xx should be yellow")
+	assert.Equal(t, string([]byte{27, 91, 57, 55, 59, 52, 50, 109}), colorForStatus(http.StatusOK), "2xx should be green")
+	assert.Equal(t, string([]byte{27, 91, 57, 48, 59, 52, 55, 109}), colorForStatus(http.StatusMovedPermanently), "3xx should be white")
+	assert.Equal(t, string([]byte{27, 91, 57, 55, 59, 52, 51, 109}), colorForStatus(http.StatusNotFound), "4xx should be yellow")
 	assert.Equal(t, string([]byte{27, 91, 57, 55, 59, 52, 49, 109}), colorForStatus(2), "other things should be red")
 }
 
@@ -106,23 +107,23 @@ func TestErrorLogger(t *testing.T) {
 		c.Error(errors.New("this is an error"))
 	})
 	router.GET("/abort", func(c *Context) {
-		c.AbortWithError(401, errors.New("no authorized"))
+		c.AbortWithError(http.StatusUnauthorized, errors.New("no authorized"))
 	})
 	router.GET("/print", func(c *Context) {
 		c.Error(errors.New("this is an error"))
-		c.String(500, "hola!")
+		c.String(http.StatusInternalServerError, "hola!")
 	})
 
 	w := performRequest(router, "GET", "/error")
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "{\"error\":\"this is an error\"}", w.Body.String())
 
 	w = performRequest(router, "GET", "/abort")
-	assert.Equal(t, 401, w.Code)
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
 	assert.Equal(t, "{\"error\":\"no authorized\"}", w.Body.String())
 
 	w = performRequest(router, "GET", "/print")
-	assert.Equal(t, 500, w.Code)
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
 	assert.Equal(t, "hola!{\"error\":\"this is an error\"}", w.Body.String())
 }
 
diff --git a/middleware_test.go b/middleware_test.go
index aa6a37a..983ad93 100644
--- a/middleware_test.go
+++ b/middleware_test.go
@@ -6,6 +6,7 @@ package gin
 
 import (
 	"errors"
+	"net/http"
 	"strings"
 	"testing"
 
@@ -37,7 +38,7 @@ func TestMiddlewareGeneralCase(t *testing.T) {
 	w := performRequest(router, "GET", "/")
 
 	// TEST
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "ACDB", signature)
 }
 
@@ -73,7 +74,7 @@ func TestMiddlewareNoRoute(t *testing.T) {
 	w := performRequest(router, "GET", "/")
 
 	// TEST
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 	assert.Equal(t, "ACEGHFDB", signature)
 }
 
@@ -110,7 +111,7 @@ func TestMiddlewareNoMethodEnabled(t *testing.T) {
 	w := performRequest(router, "GET", "/")
 
 	// TEST
-	assert.Equal(t, 405, w.Code)
+	assert.Equal(t, http.StatusMethodNotAllowed, w.Code)
 	assert.Equal(t, "ACEGHFDB", signature)
 }
 
@@ -147,7 +148,7 @@ func TestMiddlewareNoMethodDisabled(t *testing.T) {
 	w := performRequest(router, "GET", "/")
 
 	// TEST
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 	assert.Equal(t, "AC X DB", signature)
 }
 
@@ -159,7 +160,7 @@ func TestMiddlewareAbort(t *testing.T) {
 	})
 	router.Use(func(c *Context) {
 		signature += "C"
-		c.AbortWithStatus(401)
+		c.AbortWithStatus(http.StatusUnauthorized)
 		c.Next()
 		signature += "D"
 	})
@@ -173,7 +174,7 @@ func TestMiddlewareAbort(t *testing.T) {
 	w := performRequest(router, "GET", "/")
 
 	// TEST
-	assert.Equal(t, 401, w.Code)
+	assert.Equal(t, http.StatusUnauthorized, w.Code)
 	assert.Equal(t, "ACD", signature)
 }
 
@@ -183,7 +184,7 @@ func TestMiddlewareAbortHandlersChainAndNext(t *testing.T) {
 	router.Use(func(c *Context) {
 		signature += "A"
 		c.Next()
-		c.AbortWithStatus(410)
+		c.AbortWithStatus(http.StatusGone)
 		signature += "B"
 
 	})
@@ -195,7 +196,7 @@ func TestMiddlewareAbortHandlersChainAndNext(t *testing.T) {
 	w := performRequest(router, "GET", "/")
 
 	// TEST
-	assert.Equal(t, 410, w.Code)
+	assert.Equal(t, http.StatusGone, w.Code)
 	assert.Equal(t, "ACB", signature)
 }
 
@@ -207,7 +208,7 @@ func TestMiddlewareFailHandlersChain(t *testing.T) {
 	router := New()
 	router.Use(func(context *Context) {
 		signature += "A"
-		context.AbortWithError(500, errors.New("foo"))
+		context.AbortWithError(http.StatusInternalServerError, errors.New("foo"))
 	})
 	router.Use(func(context *Context) {
 		signature += "B"
@@ -218,25 +219,25 @@ func TestMiddlewareFailHandlersChain(t *testing.T) {
 	w := performRequest(router, "GET", "/")
 
 	// TEST
-	assert.Equal(t, 500, w.Code)
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
 	assert.Equal(t, "A", signature)
 }
 
 func TestMiddlewareWrite(t *testing.T) {
 	router := New()
 	router.Use(func(c *Context) {
-		c.String(400, "hola\n")
+		c.String(http.StatusBadRequest, "hola\n")
 	})
 	router.Use(func(c *Context) {
-		c.XML(400, H{"foo": "bar"})
+		c.XML(http.StatusBadRequest, H{"foo": "bar"})
 	})
 	router.Use(func(c *Context) {
-		c.JSON(400, H{"foo": "bar"})
+		c.JSON(http.StatusBadRequest, H{"foo": "bar"})
 	})
 	router.GET("/", func(c *Context) {
-		c.JSON(400, H{"foo": "bar"})
+		c.JSON(http.StatusBadRequest, H{"foo": "bar"})
 	}, func(c *Context) {
-		c.Render(400, sse.Event{
+		c.Render(http.StatusBadRequest, sse.Event{
 			Event: "test",
 			Data:  "message",
 		})
@@ -244,6 +245,6 @@ func TestMiddlewareWrite(t *testing.T) {
 
 	w := performRequest(router, "GET", "/")
 
-	assert.Equal(t, 400, w.Code)
+	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Equal(t, strings.Replace("hola\n<map><foo>bar</foo></map>{\"foo\":\"bar\"}{\"foo\":\"bar\"}event:test\ndata:message\n\n", " ", "", -1), strings.Replace(w.Body.String(), " ", "", -1))
 }
diff --git a/recovery_test.go b/recovery_test.go
index fa065b1..53f4a07 100644
--- a/recovery_test.go
+++ b/recovery_test.go
@@ -6,6 +6,7 @@ package gin
 
 import (
 	"bytes"
+	"net/http"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -22,7 +23,7 @@ func TestPanicInHandler(t *testing.T) {
 	// RUN
 	w := performRequest(router, "GET", "/recovery")
 	// TEST
-	assert.Equal(t, 500, w.Code)
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
 	assert.Contains(t, buffer.String(), "GET /recovery")
 	assert.Contains(t, buffer.String(), "Oupps, Houston, we have a problem")
 	assert.Contains(t, buffer.String(), "TestPanicInHandler")
@@ -33,13 +34,13 @@ func TestPanicWithAbort(t *testing.T) {
 	router := New()
 	router.Use(RecoveryWithWriter(nil))
 	router.GET("/recovery", func(c *Context) {
-		c.AbortWithStatus(400)
+		c.AbortWithStatus(http.StatusBadRequest)
 		panic("Oupps, Houston, we have a problem")
 	})
 	// RUN
 	w := performRequest(router, "GET", "/recovery")
 	// TEST
-	assert.Equal(t, 400, w.Code)
+	assert.Equal(t, http.StatusBadRequest, w.Code)
 }
 
 func TestSource(t *testing.T) {
diff --git a/render/redirect.go b/render/redirect.go
index f874a35..a0634f5 100644
--- a/render/redirect.go
+++ b/render/redirect.go
@@ -16,6 +16,8 @@ type Redirect struct {
 }
 
 func (r Redirect) Render(w http.ResponseWriter) error {
+	// todo(thinkerou): go1.6 not support StatusPermanentRedirect(308)
+	// when we upgrade go version we can use http.StatusPermanentRedirect
 	if (r.Code < 300 || r.Code > 308) && r.Code != 201 {
 		panic(fmt.Sprintf("Cannot redirect with status code %d", r.Code))
 	}
diff --git a/render/render_test.go b/render/render_test.go
index 8fad12b..47abf26 100755
--- a/render/render_test.go
+++ b/render/render_test.go
@@ -286,7 +286,7 @@ func TestRenderRedirect(t *testing.T) {
 	assert.NoError(t, err)
 
 	data1 := Redirect{
-		Code:     301,
+		Code:     http.StatusMovedPermanently,
 		Request:  req,
 		Location: "/new/location",
 	}
@@ -296,7 +296,7 @@ func TestRenderRedirect(t *testing.T) {
 	assert.NoError(t, err)
 
 	data2 := Redirect{
-		Code:     200,
+		Code:     http.StatusOK,
 		Request:  req,
 		Location: "/new/location",
 	}
diff --git a/response_writer_test.go b/response_writer_test.go
index fcc48b3..cc5a89d 100644
--- a/response_writer_test.go
+++ b/response_writer_test.go
@@ -35,10 +35,10 @@ func TestResponseWriterReset(t *testing.T) {
 
 	writer.reset(testWritter)
 	assert.Equal(t, -1, writer.size)
-	assert.Equal(t, 200, writer.status)
+	assert.Equal(t, http.StatusOK, writer.status)
 	assert.Equal(t, testWritter, writer.ResponseWriter)
 	assert.Equal(t, -1, w.Size())
-	assert.Equal(t, 200, w.Status())
+	assert.Equal(t, http.StatusOK, w.Status())
 	assert.False(t, w.Written())
 }
 
@@ -48,13 +48,13 @@ func TestResponseWriterWriteHeader(t *testing.T) {
 	writer.reset(testWritter)
 	w := ResponseWriter(writer)
 
-	w.WriteHeader(300)
+	w.WriteHeader(http.StatusMultipleChoices)
 	assert.False(t, w.Written())
-	assert.Equal(t, 300, w.Status())
-	assert.NotEqual(t, 300, testWritter.Code)
+	assert.Equal(t, http.StatusMultipleChoices, w.Status())
+	assert.NotEqual(t, http.StatusMultipleChoices, testWritter.Code)
 
 	w.WriteHeader(-1)
-	assert.Equal(t, 300, w.Status())
+	assert.Equal(t, http.StatusMultipleChoices, w.Status())
 }
 
 func TestResponseWriterWriteHeadersNow(t *testing.T) {
@@ -63,12 +63,12 @@ func TestResponseWriterWriteHeadersNow(t *testing.T) {
 	writer.reset(testWritter)
 	w := ResponseWriter(writer)
 
-	w.WriteHeader(300)
+	w.WriteHeader(http.StatusMultipleChoices)
 	w.WriteHeaderNow()
 
 	assert.True(t, w.Written())
 	assert.Equal(t, 0, w.Size())
-	assert.Equal(t, 300, testWritter.Code)
+	assert.Equal(t, http.StatusMultipleChoices, testWritter.Code)
 
 	writer.size = 10
 	w.WriteHeaderNow()
@@ -84,8 +84,8 @@ func TestResponseWriterWrite(t *testing.T) {
 	n, err := w.Write([]byte("hola"))
 	assert.Equal(t, 4, n)
 	assert.Equal(t, 4, w.Size())
-	assert.Equal(t, 200, w.Status())
-	assert.Equal(t, 200, testWritter.Code)
+	assert.Equal(t, http.StatusOK, w.Status())
+	assert.Equal(t, http.StatusOK, testWritter.Code)
 	assert.Equal(t, "hola", testWritter.Body.String())
 	assert.NoError(t, err)
 
diff --git a/routergroup_test.go b/routergroup_test.go
index a362e23..ce3d54a 100644
--- a/routergroup_test.go
+++ b/routergroup_test.go
@@ -5,6 +5,7 @@
 package gin
 
 import (
+	"net/http"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -50,7 +51,7 @@ func performRequestInGroup(t *testing.T, method string) {
 	assert.Equal(t, "/v1/login/", login.BasePath())
 
 	handler := func(c *Context) {
-		c.String(400, "the method was %s and index %d", c.Request.Method, c.index)
+		c.String(http.StatusBadRequest, "the method was %s and index %d", c.Request.Method, c.index)
 	}
 
 	switch method {
@@ -80,11 +81,11 @@ func performRequestInGroup(t *testing.T, method string) {
 	}
 
 	w := performRequest(router, method, "/v1/login/test")
-	assert.Equal(t, 400, w.Code)
+	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Equal(t, "the method was "+method+" and index 3", w.Body.String())
 
 	w = performRequest(router, method, "/v1/test")
-	assert.Equal(t, 400, w.Code)
+	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Equal(t, "the method was "+method+" and index 1", w.Body.String())
 }
 
diff --git a/routes_test.go b/routes_test.go
index a2389f9..23e749e 100644
--- a/routes_test.go
+++ b/routes_test.go
@@ -80,20 +80,20 @@ func testRouteNotOK2(method string, t *testing.T) {
 func TestRouterMethod(t *testing.T) {
 	router := New()
 	router.PUT("/hey2", func(c *Context) {
-		c.String(200, "sup2")
+		c.String(http.StatusOK, "sup2")
 	})
 
 	router.PUT("/hey", func(c *Context) {
-		c.String(200, "called")
+		c.String(http.StatusOK, "called")
 	})
 
 	router.PUT("/hey3", func(c *Context) {
-		c.String(200, "sup3")
+		c.String(http.StatusOK, "sup3")
 	})
 
 	w := performRequest(router, "PUT", "/hey")
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "called", w.Body.String())
 }
 
@@ -144,42 +144,42 @@ func TestRouteRedirectTrailingSlash(t *testing.T) {
 
 	w := performRequest(router, "GET", "/path/")
 	assert.Equal(t, "/path", w.Header().Get("Location"))
-	assert.Equal(t, 301, w.Code)
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
 
 	w = performRequest(router, "GET", "/path2")
 	assert.Equal(t, "/path2/", w.Header().Get("Location"))
-	assert.Equal(t, 301, w.Code)
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
 
 	w = performRequest(router, "POST", "/path3/")
 	assert.Equal(t, "/path3", w.Header().Get("Location"))
-	assert.Equal(t, 307, w.Code)
+	assert.Equal(t, http.StatusTemporaryRedirect, w.Code)
 
 	w = performRequest(router, "PUT", "/path4")
 	assert.Equal(t, "/path4/", w.Header().Get("Location"))
-	assert.Equal(t, 307, w.Code)
+	assert.Equal(t, http.StatusTemporaryRedirect, w.Code)
 
 	w = performRequest(router, "GET", "/path")
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 
 	w = performRequest(router, "GET", "/path2/")
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 
 	w = performRequest(router, "POST", "/path3")
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 
 	w = performRequest(router, "PUT", "/path4/")
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 
 	router.RedirectTrailingSlash = false
 
 	w = performRequest(router, "GET", "/path/")
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 	w = performRequest(router, "GET", "/path2")
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 	w = performRequest(router, "POST", "/path3/")
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 	w = performRequest(router, "PUT", "/path4")
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 }
 
 func TestRouteRedirectFixedPath(t *testing.T) {
@@ -194,19 +194,19 @@ func TestRouteRedirectFixedPath(t *testing.T) {
 
 	w := performRequest(router, "GET", "/PATH")
 	assert.Equal(t, "/path", w.Header().Get("Location"))
-	assert.Equal(t, 301, w.Code)
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
 
 	w = performRequest(router, "GET", "/path2")
 	assert.Equal(t, "/Path2", w.Header().Get("Location"))
-	assert.Equal(t, 301, w.Code)
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
 
 	w = performRequest(router, "POST", "/path3")
 	assert.Equal(t, "/PATH3", w.Header().Get("Location"))
-	assert.Equal(t, 307, w.Code)
+	assert.Equal(t, http.StatusTemporaryRedirect, w.Code)
 
 	w = performRequest(router, "POST", "/path4")
 	assert.Equal(t, "/Path4/", w.Header().Get("Location"))
-	assert.Equal(t, 307, w.Code)
+	assert.Equal(t, http.StatusTemporaryRedirect, w.Code)
 }
 
 // TestContextParamsGet tests that a parameter can be parsed from the URL.
@@ -236,7 +236,7 @@ func TestRouteParamsByName(t *testing.T) {
 
 	w := performRequest(router, "GET", "/test/john/smith/is/super/great")
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "john", name)
 	assert.Equal(t, "smith", lastName)
 	assert.Equal(t, "/is/super/great", wild)
@@ -265,7 +265,7 @@ func TestRouteStaticFile(t *testing.T) {
 	w2 := performRequest(router, "GET", "/result")
 
 	assert.Equal(t, w, w2)
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "Gin Web Framework", w.Body.String())
 	assert.Equal(t, "text/plain; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 
@@ -273,7 +273,7 @@ func TestRouteStaticFile(t *testing.T) {
 	w4 := performRequest(router, "HEAD", "/result")
 
 	assert.Equal(t, w3, w4)
-	assert.Equal(t, 200, w3.Code)
+	assert.Equal(t, http.StatusOK, w3.Code)
 }
 
 // TestHandleStaticDir - ensure the root/sub dir handles properly
@@ -283,7 +283,7 @@ func TestRouteStaticListingDir(t *testing.T) {
 
 	w := performRequest(router, "GET", "/")
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Contains(t, w.Body.String(), "gin.go")
 	assert.Equal(t, "text/html; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 }
@@ -295,7 +295,7 @@ func TestRouteStaticNoListing(t *testing.T) {
 
 	w := performRequest(router, "GET", "/")
 
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 	assert.NotContains(t, w.Body.String(), "gin.go")
 }
 
@@ -310,7 +310,7 @@ func TestRouterMiddlewareAndStatic(t *testing.T) {
 
 	w := performRequest(router, "GET", "/gin.go")
 
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Contains(t, w.Body.String(), "package gin")
 	assert.Equal(t, "text/plain; charset=utf-8", w.HeaderMap.Get("Content-Type"))
 	assert.NotEqual(t, w.HeaderMap.Get("Last-Modified"), "Mon, 02 Jan 2006 15:04:05 MST")
@@ -348,14 +348,14 @@ func TestRouteNotAllowedDisabled(t *testing.T) {
 	router.HandleMethodNotAllowed = false
 	router.POST("/path", func(c *Context) {})
 	w := performRequest(router, "GET", "/path")
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 
 	router.NoMethod(func(c *Context) {
 		c.String(http.StatusTeapot, "responseText")
 	})
 	w = performRequest(router, "GET", "/path")
 	assert.Equal(t, "404 page not found", w.Body.String())
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 }
 
 func TestRouterNotFound(t *testing.T) {
@@ -370,20 +370,20 @@ func TestRouterNotFound(t *testing.T) {
 		code     int
 		location string
 	}{
-		{"/path/", 301, "/path"},   // TSR -/
-		{"/dir", 301, "/dir/"},     // TSR +/
-		{"", 301, "/"},             // TSR +/
-		{"/PATH", 301, "/path"},    // Fixed Case
-		{"/DIR/", 301, "/dir/"},    // Fixed Case
-		{"/PATH/", 301, "/path"},   // Fixed Case -/
-		{"/DIR", 301, "/dir/"},     // Fixed Case +/
-		{"/../path", 301, "/path"}, // CleanPath
-		{"/nope", 404, ""},         // NotFound
+		{"/path/", http.StatusMovedPermanently, "/path"},   // TSR -/
+		{"/dir", http.StatusMovedPermanently, "/dir/"},     // TSR +/
+		{"", http.StatusMovedPermanently, "/"},             // TSR +/
+		{"/PATH", http.StatusMovedPermanently, "/path"},    // Fixed Case
+		{"/DIR/", http.StatusMovedPermanently, "/dir/"},    // Fixed Case
+		{"/PATH/", http.StatusMovedPermanently, "/path"},   // Fixed Case -/
+		{"/DIR", http.StatusMovedPermanently, "/dir/"},     // Fixed Case +/
+		{"/../path", http.StatusMovedPermanently, "/path"}, // CleanPath
+		{"/nope", http.StatusNotFound, ""},                 // NotFound
 	}
 	for _, tr := range testRoutes {
 		w := performRequest(router, "GET", tr.route)
 		assert.Equal(t, tr.code, w.Code)
-		if w.Code != 404 {
+		if w.Code != http.StatusNotFound {
 			assert.Equal(t, tr.location, fmt.Sprint(w.Header().Get("Location")))
 		}
 	}
@@ -391,24 +391,24 @@ func TestRouterNotFound(t *testing.T) {
 	// Test custom not found handler
 	var notFound bool
 	router.NoRoute(func(c *Context) {
-		c.AbortWithStatus(404)
+		c.AbortWithStatus(http.StatusNotFound)
 		notFound = true
 	})
 	w := performRequest(router, "GET", "/nope")
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 	assert.True(t, notFound)
 
 	// Test other method than GET (want 307 instead of 301)
 	router.PATCH("/path", func(c *Context) {})
 	w = performRequest(router, "PATCH", "/path/")
-	assert.Equal(t, 307, w.Code)
+	assert.Equal(t, http.StatusTemporaryRedirect, w.Code)
 	assert.Equal(t, "map[Location:[/path]]", fmt.Sprint(w.Header()))
 
 	// Test special case where no node for the prefix "/" exists
 	router = New()
 	router.GET("/a", func(c *Context) {})
 	w = performRequest(router, "GET", "/")
-	assert.Equal(t, 404, w.Code)
+	assert.Equal(t, http.StatusNotFound, w.Code)
 }
 
 func TestRouteRawPath(t *testing.T) {
@@ -427,7 +427,7 @@ func TestRouteRawPath(t *testing.T) {
 	})
 
 	w := performRequest(route, "POST", "/project/Some%2FOther%2FProject/build/222")
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 }
 
 func TestRouteRawPathNoUnescape(t *testing.T) {
@@ -447,7 +447,7 @@ func TestRouteRawPathNoUnescape(t *testing.T) {
 	})
 
 	w := performRequest(route, "POST", "/project/Some%2FOther%2FProject/build/333")
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
 }
 
 func TestRouteServeErrorWithWriteHeader(t *testing.T) {
diff --git a/utils_test.go b/utils_test.go
index 95b5de5..9b57c57 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -25,7 +25,7 @@ type testStruct struct {
 func (t *testStruct) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	assert.Equal(t.T, "POST", req.Method)
 	assert.Equal(t.T, "/path", req.URL.Path)
-	w.WriteHeader(500)
+	w.WriteHeader(http.StatusInternalServerError)
 	fmt.Fprint(w, "hello")
 }
 
@@ -35,16 +35,16 @@ func TestWrap(t *testing.T) {
 	router.GET("/path2", WrapF(func(w http.ResponseWriter, req *http.Request) {
 		assert.Equal(t, "GET", req.Method)
 		assert.Equal(t, "/path2", req.URL.Path)
-		w.WriteHeader(400)
+		w.WriteHeader(http.StatusBadRequest)
 		fmt.Fprint(w, "hola!")
 	}))
 
 	w := performRequest(router, "POST", "/path")
-	assert.Equal(t, 500, w.Code)
+	assert.Equal(t, http.StatusInternalServerError, w.Code)
 	assert.Equal(t, "hello", w.Body.String())
 
 	w = performRequest(router, "GET", "/path2")
-	assert.Equal(t, 400, w.Code)
+	assert.Equal(t, http.StatusBadRequest, w.Code)
 	assert.Equal(t, "hola!", w.Body.String())
 }