diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index ac2e9a9..2caf5b4 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -237,7 +237,7 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.0)
+    rexml (3.3.6)
       strscan
     rouge (3.26.0)
     ruby2_keywords (0.0.4)