diff --git a/Makefile b/Makefile
index 6350c65..31cee21 100644
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,7 @@ all: add-copyright format build
 
 .PHONY: build
 build: tidy # build.
-	@go build -v -ldflags "$(GO_LDFLAGS)" -o $(OUTPUT_DIR)/howmuch $(ROOT_DIR)/cmd/howmuch/main.go
+	@go build -v -ldflags "$(GO_LDFLAGS)" -o $(OUTPUT_DIR)/howmuch $(ROOT_DIR)/cmd/howmuch/main.go 2>/dev/null
 
 .PHONY: format
 format: # format code.
@@ -43,6 +43,7 @@ format: # format code.
 .PHONY: add-copyright
 add-copyright: # add license to file headers.
 	@addlicense -v -f $(ROOT_DIR)/LICENSE  -ignore third_party/** -ignore vendor/** -ignore $(OUTPUT_DIR) $(ROOT_DIR)
+
 .PHONY: swagger
 swagger: # Run swagger.
 	@swagger serve -F=swagger --no-open --port 65534 $(ROOT_DIR)/api/openapi/openapi.yaml
diff --git a/cmd/howmuch/main.go b/cmd/howmuch/main.go
index 30319de..fd766f9 100644
--- a/cmd/howmuch/main.go
+++ b/cmd/howmuch/main.go
@@ -28,7 +28,7 @@ import (
 	"os"
 
 	"git.vinchent.xyz/vinchent/howmuch/internal/howmuch"
-	_ "go.uber.org/automaxprocs"
+	// _ "go.uber.org/automaxprocs"
 )
 
 func main() {
diff --git a/go.mod b/go.mod
index 85d0675..7f44e6f 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,6 @@ require (
 	github.com/spf13/cobra v1.8.1
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.19.0
-	go.uber.org/automaxprocs v1.6.0
 	go.uber.org/zap v1.27.0
 )
 
diff --git a/go.sum b/go.sum
index ff10e9c..ce91fc9 100644
--- a/go.sum
+++ b/go.sum
@@ -75,8 +75,6 @@ github.com/pelletier/go-toml/v2 v2.2.2/go.mod h1:1t835xjRzz80PqgE6HHgN2JOsmgYu/h
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
-github.com/prashantv/gostub v1.1.0/go.mod h1:A5zLQHz7ieHGG7is6LLXLz7I8+3LZzsrV0P1IAHhP5U=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
@@ -116,8 +114,6 @@ github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
 github.com/ugorji/go/codec v1.2.12 h1:9LC83zGrHhuUA9l16C9AHXAqEV/2wBQ4nkvumAE65EE=
 github.com/ugorji/go/codec v1.2.12/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
-go.uber.org/automaxprocs v1.6.0 h1:O3y2/QNTOdbF+e/dpXNNW7Rx2hZ4sTIPyybbxyNqTUs=
-go.uber.org/automaxprocs v1.6.0/go.mod h1:ifeIMSnPZuznNm6jmdzmU3/bfk01Fe2fotchwEFJ8r8=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
diff --git a/internal/howmuch/helpers.go b/internal/howmuch/helpers.go
index bee0fe1..4caf0de 100644
--- a/internal/howmuch/helpers.go
+++ b/internal/howmuch/helpers.go
@@ -65,9 +65,10 @@ func initConfig() {
 
 	if err := viper.ReadInConfig(); err != nil {
 		log.ErrorLog("Failed to read viper configuration file", "err", err)
+		return
 	}
 
-	log.InfoLog("Using config file", "file", viper.ConfigFileUsed())
+	log.DebugLog("Using config file", "file", viper.ConfigFileUsed())
 }
 
 // logOptions set log options from the configs read by viper.