diff --git a/html/poketube.ejs b/html/poketube.ejs
index 163ddcf..971c5e5 100644
--- a/html/poketube.ejs
+++ b/html/poketube.ejs
@@ -353,7 +353,7 @@ a[data-onclick="jump_to_time"] {
  
   <!-- css files -->
   <link href="/css/app-cdn.min.css" rel=stylesheet>
-  <link href="/css/app.main.css" rel=stylesheet>
+  <link href="/css/app.main.css?v=4" rel=stylesheet>
   <link href="/css/watch.main.css" rel=stylesheet>
   <link href="/css/watch-util.css" rel=stylesheet>
   <link href="/css/watch-navbar.css" rel=stylesheet>