diff --git a/Gemfile.lock b/Gemfile.lock
index 0655d2a1..8aa39894 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,7 +95,8 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.6)
+      strscan
     rouge (3.30.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
@@ -106,6 +107,7 @@ GEM
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
+    strscan (3.1.0)
     thread_safe (0.3.6)
     tzinfo (1.2.11)
       thread_safe (~> 0.1)