diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 90979298ea6..5935a207df4 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -226,8 +226,8 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.3)
+      strscan
     rouge (3.26.0)
     ruby2_keywords (0.0.5)
     rubyzip (2.3.2)