diff --git a/countdown/index.html b/countdown/index.html
index 08bc13f..28b21d6 100644
--- a/countdown/index.html
+++ b/countdown/index.html
@@ -3,6 +3,7 @@
 
 <head>
     <meta charset="UTF-8">
+    <meta name=viewport content="width=device-width, initial-scale=1.0">
     <style>
         /* latin */
         @font-face {
