diff --git a/src/config/Config.coffee b/src/config/Config.coffee
index 9249beaa3..6ef30b26e 100644
--- a/src/config/Config.coffee
+++ b/src/config/Config.coffee
@@ -804,6 +804,8 @@ Config =
     http://www.google.com
     https://www.google.com
     https://www.gstatic.com
+    http://cdn.mathjax.org
+    https://cdn.mathjax.org
     'self'
     'unsafe-inline'
     'unsafe-eval'