diff --git a/docs/lab/flv.html b/docs/lab/flv.html
index 851b9f15a..2daa947f0 100644
--- a/docs/lab/flv.html
+++ b/docs/lab/flv.html
@@ -21,7 +21,7 @@
         <div class="part-left">
             <div class="controls">
                 <div class="left">
-                    <a href="./" class="logo">ArtPlayer.js Lab</a>
+                    <a href="./flv.html" class="logo">ArtPlayer.js Lab</a>
                     <a href="../docs" class="logo">Document</a>
                     <iframe src="https://ghbtns.com/github-btn.html?user=zhw2590582&repo=ArtPlayer&type=star&count=true" frameborder="0" scrolling="0" width="100px" height="20px"></iframe>
                     <iframe src="https://ghbtns.com/github-btn.html?user=zhw2590582&repo=ArtPlayer&type=fork&count=true" frameborder="0" scrolling="0" width="100px" height="20px"></iframe>
@@ -42,7 +42,6 @@
     <script src="./plugins/javascript.js"></script>
     <script src="https://cdn.bootcss.com/flv.js/1.4.2/flv.js"></script>
     <script src="./js/artplayer.js"></script>
-    <script src="./js/artplayer-plugin-subtitle.js"></script>
     <script src="./js/common.js"></script>
     <script>
         var _hmt = _hmt || [];
diff --git a/packages/artplayer/src/player/mountUrlMix.js b/packages/artplayer/src/player/mountUrlMix.js
deleted file mode 100644
index 577bd9aae..000000000
--- a/packages/artplayer/src/player/mountUrlMix.js
+++ /dev/null
@@ -1,6 +0,0 @@
-export default function mountUrlMix(art, player) {
-    Object.defineProperty(player, 'mountUrl', {
-        writable: true,
-        value: url => url,
-    });
-}