diff --git a/Gemfile.lock b/Gemfile.lock
index 3bbe3d9..b1eb78a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -199,7 +199,7 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rdoc (6.3.0)
+    rdoc (6.3.1)
     responders (3.0.1)
       actionpack (>= 5.0)
       railties (>= 5.0)