diff --git a/app/index.html b/app/index.html
index 52904536..98c5036b 100644
--- a/app/index.html
+++ b/app/index.html
@@ -15,7 +15,7 @@
   <!-- endbuild -->
 
   <!-- <link rel="stylesheet" href="css/font.css"/> -->
-  <link href='http://fonts.googleapis.com/css?family=Open+Sans:400,600&amp;subset=cyrillic,cyrillic-ext,latin,latin-ext' rel='stylesheet' type='text/css'>
+  <link href="//fonts.googleapis.com/css?family=Open+Sans:400,600&amp;subset=cyrillic,cyrillic-ext,latin,latin-ext" rel="stylesheet" type="text/css">
 
   <link rel="icon" href="favicon.ico" type="image/x-icon" />