diff --git a/Library/Homebrew/vendor/Gemfile.lock b/Library/Homebrew/vendor/Gemfile.lock
index c6ab320754..48bf4c3ea2 100644
--- a/Library/Homebrew/vendor/Gemfile.lock
+++ b/Library/Homebrew/vendor/Gemfile.lock
@@ -42,12 +42,14 @@ GEM
       ast (~> 2.4.0)
     plist (3.5.0)
     powerpack (0.1.2)
+    psych (3.1.0)
     rainbow (3.0.0)
-    rubocop (0.64.0)
+    rubocop (0.65.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.5, != 2.5.1.1)
       powerpack (~> 0.1)
+      psych (>= 3.1.0)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.4.0)