diff --git a/Gemfile b/Gemfile
index 08ab18af..ce43b679 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,7 +25,7 @@ group :test do
   gem "nokogiri", "~> 1.7"
   gem "rspec"
   gem "rspec-mocks"
-  gem "rubocop", "~> 0.55.0"
+  gem "rubocop", "~> 0.56.0"
   gem "test-dependency-theme", :path => File.expand_path("test/fixtures/test-dependency-theme", __dir__)
   gem "test-theme", :path => File.expand_path("test/fixtures/test-theme", __dir__)