diff --git a/internal/version/debug.go b/internal/version/debug.go
deleted file mode 100644
index a2c3afab..00000000
--- a/internal/version/debug.go
+++ /dev/null
@@ -1,7 +0,0 @@
-//go:build debug
-
-package version
-
-func init() {
-	_debug = true
-}
diff --git a/internal/version/version.go b/internal/version/version.go
index 3bb92ae6..d5951f20 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -9,8 +9,6 @@ import (
 const Name = "tun2socks"
 
 var (
-	_debug = false
-
 	// Version can be set at link time by executing
 	// the command: `git describe --abbrev=0 --tags HEAD`
 	Version string
@@ -20,19 +18,8 @@ var (
 	GitCommit string
 )
 
-func versionize(s string) string {
-	return strings.TrimPrefix(s, "v")
-}
-
-func Debug() bool {
-	return _debug
-}
-
 func String() string {
-	if !Debug() {
-		return fmt.Sprintf("%s-%s", Name, versionize(Version))
-	}
-	return fmt.Sprintf("%s-%s (debug)", Name, versionize(Version))
+	return fmt.Sprintf("%s-%s", Name, strings.TrimPrefix(Version, "v"))
 }
 
 func BuildString() string {
diff --git a/restapi/server.go b/restapi/server.go
index 3db92e4c..b55462a4 100644
--- a/restapi/server.go
+++ b/restapi/server.go
@@ -210,7 +210,6 @@ func version(w http.ResponseWriter, r *http.Request) {
 	render.JSON(w, r, render.M{
 		"version": V.Version,
 		"commit":  V.GitCommit,
-		"debug":   V.Debug(),
 		"modules": V.Info(),
 	})
 }