diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 9b0142e..f1d6f03 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -73,7 +73,7 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.3.9)
     rouge (3.26.1)
     safe_yaml (1.0.5)
     sassc (2.4.0)