diff --git a/Gemfile.lock b/Gemfile.lock
index 39412a2..e5d3d90 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,8 @@ GEM
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
     i18n (0.8.6)
-    kramdown (1.15.0)
+    kramdown (2.3.0)
+      rexml
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -73,6 +74,7 @@ GEM
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
     ref (2.0.0)
+    rexml (3.2.4)
     ruby_dep (1.5.0)
     sass (3.5.1)
       sass-listen (~> 4.0.0)