diff --git a/Gemfile.lock b/Gemfile.lock
index 7ec215d..9326684 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,7 +35,8 @@ GEM
     haml (4.0.5)
       tilt
     http_parser.rb (0.5.3)
-    kramdown (1.3.3)
+    kramdown (2.3.0)
+      rexml
     listen (2.7.1)
       celluloid (>= 0.15.2)
       celluloid-io (>= 0.15.0)
@@ -55,6 +56,7 @@ GEM
     rb-fsevent (0.9.4)
     rb-inotify (0.9.3)
       ffi (>= 0.5.0)
+    rexml (3.2.4)
     sass (3.3.4)
     slop (3.5.0)
     thor (0.19.1)