diff --git a/README.md b/README.md
index 883f9d5..535ee4e 100644
--- a/README.md
+++ b/README.md
@@ -777,6 +777,65 @@ func main() {
 }
 ```
 
+### Support Let's Encrypt
+
+example for 1-line LetsEncrypt HTTPS servers.
+
+[embedmd]:# (examples/auto-tls/example1.go go)
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/gin-gonic/autotls"
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	r := gin.Default()
+
+	// Ping handler
+	r.GET("/ping", func(c *gin.Context) {
+		c.String(200, "pong")
+	})
+
+	log.Fatal(autotls.Run(r, "example1.com", "example2.com"))
+}
+```
+
+example for custom autocert manager.
+
+[embedmd]:# (examples/auto-tls/example2.go go)
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/gin-gonic/autotls"
+	"github.com/gin-gonic/gin"
+	"golang.org/x/crypto/acme/autocert"
+)
+
+func main() {
+	r := gin.Default()
+
+	// Ping handler
+	r.GET("/ping", func(c *gin.Context) {
+		c.String(200, "pong")
+	})
+
+	m := autocert.Manager{
+		Prompt:     autocert.AcceptTOS,
+		HostPolicy: autocert.HostWhitelist("example1.com", "example2.com"),
+		Cache:      autocert.DirCache("/var/www/.cache"),
+	}
+
+	log.Fatal(autotls.RunWithManager(r, m))
+}
+```
+
 ### Graceful restart or stop
 
 Do you want to graceful restart or stop your web server?
diff --git a/examples/auto-tls/example1.go b/examples/auto-tls/example1.go
new file mode 100644
index 0000000..fa9f400
--- /dev/null
+++ b/examples/auto-tls/example1.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+	"log"
+
+	"github.com/gin-gonic/autotls"
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	r := gin.Default()
+
+	// Ping handler
+	r.GET("/ping", func(c *gin.Context) {
+		c.String(200, "pong")
+	})
+
+	log.Fatal(autotls.Run(r, "example1.com", "example2.com"))
+}
diff --git a/examples/auto-tls/example2.go b/examples/auto-tls/example2.go
new file mode 100644
index 0000000..ab8b81e
--- /dev/null
+++ b/examples/auto-tls/example2.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"log"
+
+	"github.com/gin-gonic/autotls"
+	"github.com/gin-gonic/gin"
+	"golang.org/x/crypto/acme/autocert"
+)
+
+func main() {
+	r := gin.Default()
+
+	// Ping handler
+	r.GET("/ping", func(c *gin.Context) {
+		c.String(200, "pong")
+	})
+
+	m := autocert.Manager{
+		Prompt:     autocert.AcceptTOS,
+		HostPolicy: autocert.HostWhitelist("example1.com", "example2.com"),
+		Cache:      autocert.DirCache("/var/www/.cache"),
+	}
+
+	log.Fatal(autotls.RunWithManager(r, m))
+}
diff --git a/examples/auto-tls/main.go b/examples/auto-tls/main.go
deleted file mode 100644
index 49544c5..0000000
--- a/examples/auto-tls/main.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package main
-
-import (
-	"github.com/gin-gonic/gin"
-	"golang.org/x/crypto/acme/autocert"
-)
-
-func main() {
-	r := gin.Default()
-
-	// folder for storing certificates
-	gin.AutoTLSManager.Cache = autocert.DirCache("/var/www/.cache")
-
-	// Ping handler
-	r.GET("/ping", func(c *gin.Context) {
-		c.String(200, "pong")
-	})
-
-	// Listen and Server in 0.0.0.0:443
-	r.RunAutoTLS("example1.com", "example2.com")
-}
diff --git a/gin1.7.go b/gin1.7.go
deleted file mode 100644
index 919c80f..0000000
--- a/gin1.7.go
+++ /dev/null
@@ -1,37 +0,0 @@
-// +build go1.7
-
-package gin
-
-import (
-	"crypto/tls"
-	"net/http"
-
-	"golang.org/x/crypto/acme/autocert"
-)
-
-// AutoTLSManager is a stateful certificate manager built on top of acme.Client.
-var AutoTLSManager = autocert.Manager{
-	Prompt: autocert.AcceptTOS,
-}
-
-// RunAutoTLS attaches the router to a http.Server and starts listening and serving HTTPS (secure) requests.
-// It obtains and refreshes certificates automatically,
-// as well as providing them to a TLS server via tls.Config.
-// only from Go version 1.7 onward
-func (engine *Engine) RunAutoTLS(domain ...string) (err error) {
-	debugPrint("Listening and serving HTTPS on host name is %s\n", domain)
-	defer func() { debugPrintError(err) }()
-
-	// HostPolicy controls which domains the Manager will attempt
-	if len(domain) != 0 {
-		AutoTLSManager.HostPolicy = autocert.HostWhitelist(domain...)
-	}
-
-	s := &http.Server{
-		Addr:      ":https",
-		TLSConfig: &tls.Config{GetCertificate: AutoTLSManager.GetCertificate},
-		Handler:   engine,
-	}
-	err = s.ListenAndServeTLS("", "")
-	return
-}