diff --git a/Gemfile.lock b/Gemfile.lock
index be1903a..5cf4af9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,10 +90,10 @@ GEM
     rubocop-performance (1.19.1)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.15.2)
+    rubocop-rails (2.21.2)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 1.7.0, < 2.0)
+      rubocop (>= 1.33.0, < 2.0)
     ruby-progressbar (1.13.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)