diff --git a/Dockerfile b/Dockerfile
index ed4ccea..6b20c21 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM golang:1.14.2-buster AS builder
 COPY . /app
-RUN cd /app && env CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -ldflags='-linkmode external -extldflags "-static" -s -w' -o openvpn-user
+RUN cd /app && CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -ldflags='-linkmode external -extldflags "-static" -s -w' -o openvpn-user
 
 FROM alpine:3.13
 WORKDIR /app
diff --git a/openvpn-user.go b/openvpn-user.go
index ce3013e..1e17a20 100644
--- a/openvpn-user.go
+++ b/openvpn-user.go
@@ -11,7 +11,7 @@ import (
 )
 
 const (
-	version = "1.0.3-alpha"
+	version = "1.0.3-rc.1"
 )
 
 var (
@@ -49,7 +49,6 @@ var (
 
 	debug = kingpin.Flag("debug", "Enable debug mode.").Default("false").Bool()
 
-	versionCommand = kingpin.Command("version", "Show version.")
 )
 
 type User struct {
@@ -61,7 +60,7 @@ type User struct {
 }
 
 func main() {
-
+	kingpin.Version(version)
 	switch kingpin.Parse() {
 	case createCommand.FullCommand():
 		createUser(*createCommandUserFlag, *createCommandPasswordFlag)
@@ -83,13 +82,8 @@ func main() {
 		initDb()
 	case dbMigrateCommand.FullCommand():
 		migrateDb()
-	case versionCommand.FullCommand():
-		showVersion()
 	}
 }
-func showVersion() {
-	fmt.Printf("openvpn-user: version %s n", version)
-}
 
 func getDb() *sql.DB {
 	db, err := sql.Open("sqlite3", *dbPath)