diff --git a/Gemfile.lock b/Gemfile.lock
index 950bb07..1158341 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -339,7 +339,7 @@ GEM
     rubocop-performance (1.19.0)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.20.2)
+    rubocop-rails (2.21.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)