diff --git a/index.html b/index.html
index a3755f74efeeae9e75aaf164c0e3f22085070a27..127672dc8b5699cc643af613fb114ba63ebe0032 100644
--- a/index.html
+++ b/index.html
@@ -154,9 +154,9 @@
   license that CodeMirror uses.</p>
 
   <p>Discussion around the project is done on
-  a <a href="groups.google.com/group/codemirror">mailing list</a>.
+  a <a href="http://groups.google.com/group/codemirror">mailing list</a>.
   There is also
-  the <a href="groups.google.com/group/codemirror-announce">codemirror-announce</a>
+  the <a href="http://groups.google.com/group/codemirror-announce">codemirror-announce</a>
   list, which is only used for major announcements (such as new
   versions). If needed, you can
   contact <a href="mailto:marijnh@gmail.com">the maintainer</a>