diff --git a/README.md b/README.md
index 15f8398..22e228b 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,8 @@ Flags:
       --[no-]extra-arches-show-default
                              Show default extra arch name.
   -d, --output="build"       Output dir path.
+  -f, --output-format=OUTPUT-FORMAT  
+                             Output file name format.
   -o, --name=NAME            Output binary file name.
       --divider="-"          Divider in name.
 
diff --git a/README_CN.md b/README_CN.md
index b8b939b..590d37a 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -33,6 +33,8 @@ Flags:
       --[no-]extra-arches-show-default
                              Show default extra arch name.
   -d, --output="build"       Output dir path.
+  -f, --output-format=OUTPUT-FORMAT  
+                             Output file name format.
   -o, --name=NAME            Output binary file name.
       --divider="-"          Divider in name.
 
diff --git a/internal/global/commands.go b/internal/global/commands.go
index fef75e2..f08a975 100644
--- a/internal/global/commands.go
+++ b/internal/global/commands.go
@@ -27,7 +27,7 @@ func NewCommands(version string) *kingpin.Application {
 	app.Flag("extra-arches-show-default", "Show default extra arch name.").BoolVar(&Config.ExtraArchesShowDefault)
 
 	app.Flag("output", "Output dir path.").Short('d').Default("build").StringVar(&Config.Output)
-	app.Flag("output-format", "Output file name format").Short('f').EnumVar(&Config.OutputFormat, "", "post")
+	app.Flag("output-format", "Output file name format.").Short('f').EnumVar(&Config.OutputFormat, "", "post")
 	app.Flag("name", "Output binary file name.").Short('o').StringVar(&Config.Name)
 	app.Flag("divider", "Divider in name.").Default("_").StringVar(&Config.Divider)
 	app.Arg("target", "Target package.").Required().StringVar(&Config.Target)