diff --git a/lib/gollum/frontend/templates/history.mustache b/lib/gollum/frontend/templates/history.mustache
index 0f8c165d..eb4b6f5b 100755
--- a/lib/gollum/frontend/templates/history.mustache
+++ b/lib/gollum/frontend/templates/history.mustache
@@ -29,7 +29,7 @@
         </td>
         <td class="author">
           <a href="javascript:void(0)">
-            <img src="http://www.gravatar.com/avatar/{{gravatar}}?s=16"
+            <img src="https://secure.gravatar.com/avatar/{{gravatar}}?s=16"
              alt="avatar: {{author}}" class="mini-gravatar">
             <span class="username">{{author}}</span>
           </a>