diff --git a/.gitignore b/.gitignore
index e62941ba23..50c3e28f0b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ _site
 .sass-cache
 .jekyll-metadata
 node_modules
+Gemfile.lock
diff --git a/Gemfile.lock b/Gemfile.lock
index 2a72ddaf52..f9d5160896 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,7 +53,7 @@ GEM
       ffi (~> 1.0)
     rouge (3.3.0)
     ruby_dep (1.5.0)
-    safe_yaml (1.0.4)
+    safe_yaml (1.0.5)
     sass (3.7.3)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
diff --git a/_includes/mathjax-support.html b/_includes/mathjax-support.html
index f53420779c..1d79013c24 100644
--- a/_includes/mathjax-support.html
+++ b/_includes/mathjax-support.html
@@ -13,4 +13,4 @@
   });
 </script>
 
-<script src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML" type="text/javascript"></script>
+<script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML" type="text/javascript"></script>