diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 5935a207df4..bac5eb36d35 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -226,7 +226,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.3)
+    rexml (3.3.6)
       strscan
     rouge (3.26.0)
     ruby2_keywords (0.0.5)