diff --git a/docker/index.md b/docker/index.md
index 131d95e..f51c15f 100644
--- a/docker/index.md
+++ b/docker/index.md
@@ -85,7 +85,7 @@ $ exit ##停止退出
 
 $ ctrl+P+Q ##不停止退出
 
-$ docker cp "container ID""path1" "path2" ##從container複製檔案到本機
+$ docker cp "container ID":"path1" "path2" ##從container複製檔案到本機