diff --git a/cmd/root.go b/cmd/root.go
index 400a33b..b010859 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -27,7 +27,7 @@ var cmd = &cobra.Command{
 
 func init() {
 	cmd.AddCommand(version.Cmd, login.Cmd, dl.Cmd)
-	cmd.PersistentFlags().String("proxy", "", "proxy address, only socks5 is supported")
+	cmd.PersistentFlags().String("proxy", "", "proxy address, only socks5 is supported, format: protocol://username:password@host:port")
 	cmd.PersistentFlags().StringP("ns", "n", "", "namespace for Telegram session")
 
 	docs := filepath.Join(consts.DocsPath, "command")
diff --git a/docs/command/tdl.md b/docs/command/tdl.md
index bd75de2..a29b556 100644
--- a/docs/command/tdl.md
+++ b/docs/command/tdl.md
@@ -13,7 +13,7 @@ tdl -h
 ```
   -h, --help           help for tdl
   -n, --ns string      namespace for Telegram session
-      --proxy string   proxy address, only socks5 is supported
+      --proxy string   proxy address, only socks5 is supported, format: protocol://username:password@host:port
 ```
 
 ### SEE ALSO
diff --git a/docs/command/tdl_dl.md b/docs/command/tdl_dl.md
index 515d843..5400cd9 100644
--- a/docs/command/tdl_dl.md
+++ b/docs/command/tdl_dl.md
@@ -27,7 +27,7 @@ tdl dl
 
 ```
   -n, --ns string      namespace for Telegram session
-      --proxy string   proxy address, only socks5 is supported
+      --proxy string   proxy address, only socks5 is supported, format: protocol://username:password@host:port
 ```
 
 ### SEE ALSO
diff --git a/docs/command/tdl_login.md b/docs/command/tdl_login.md
index 1cd279c..e4d3010 100644
--- a/docs/command/tdl_login.md
+++ b/docs/command/tdl_login.md
@@ -22,7 +22,7 @@ tdl login
 
 ```
   -n, --ns string      namespace for Telegram session
-      --proxy string   proxy address, only socks5 is supported
+      --proxy string   proxy address, only socks5 is supported, format: protocol://username:password@host:port
 ```
 
 ### SEE ALSO
diff --git a/docs/command/tdl_version.md b/docs/command/tdl_version.md
index af4c939..a09f51e 100644
--- a/docs/command/tdl_version.md
+++ b/docs/command/tdl_version.md
@@ -22,7 +22,7 @@ tdl version
 
 ```
   -n, --ns string      namespace for Telegram session
-      --proxy string   proxy address, only socks5 is supported
+      --proxy string   proxy address, only socks5 is supported, format: protocol://username:password@host:port
 ```
 
 ### SEE ALSO