diff --git a/templates/base.html b/templates/base.html
index a4932e5..be505cf 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -54,9 +54,9 @@
   <link href="{{ SITEURL }}/{{ THEME_STATIC_DIR}}/css/{{ CSS_FILE }}" media="screen, projection"
         rel="stylesheet" type="text/css">
 
-  <link href="//fonts.googleapis.com/css?family=PT+Serif:regular,italic,bold,bolditalic"
+  <link href="https://fonts.googleapis.com/css?family=PT+Serif:regular,italic,bold,bolditalic"
         rel="stylesheet" type="text/css">
-  <link href="//fonts.googleapis.com/css?family=PT+Sans:regular,italic,bold,bolditalic"
+  <link href="https://fonts.googleapis.com/css?family=PT+Sans:regular,italic,bold,bolditalic"
         rel="stylesheet" type="text/css">
   {% if article and article.latex %}
     {{ article.latex }}