diff --git a/doc/website/Gemfile.lock b/doc/website/Gemfile.lock
index 5bd22182d..6840633ae 100644
--- a/doc/website/Gemfile.lock
+++ b/doc/website/Gemfile.lock
@@ -48,7 +48,7 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.3.9)
+    rexml (3.4.2)
     rouge (3.26.1)
     safe_yaml (1.0.5)
     sassc (2.4.0)