diff --git a/main.go b/main.go
index 569fd20..9d560c3 100644
--- a/main.go
+++ b/main.go
@@ -27,7 +27,7 @@ var (
 )
 
 func main() {
-	flag.StringVar(&configFile, "c", "config.yml", "path of configuration file (default:config.yaml)")
+	flag.StringVar(&configFile, "config", "config.yml", "path of configuration file (default:config.yaml)")
 	flag.Parse()
 	config = models.ConfigReadFile(configFile)