diff --git a/Library/Homebrew/Gemfile.lock b/Library/Homebrew/Gemfile.lock
index 64647555e9..5b706e78d8 100644
--- a/Library/Homebrew/Gemfile.lock
+++ b/Library/Homebrew/Gemfile.lock
@@ -123,7 +123,7 @@ GEM
       rspec (>= 3, < 4)
     rspec_junit_formatter (0.5.1)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (1.30.1)
+    rubocop (1.31.0)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)