diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index b04b346..d37d25b 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.3.7)
+    rexml (3.3.9)
     rouge (4.4.0)
     safe_yaml (1.0.5)
     sass-embedded (1.79.3-x86_64-linux-gnu)