diff --git a/Gemfile b/Gemfile
index c20ea234..af7e2190 100644
--- a/Gemfile
+++ b/Gemfile
@@ -31,7 +31,7 @@ group :test do
   gem "nokogiri", RUBY_VERSION >= "2.2" ? "~> 1.7" : "~> 1.7.0"
   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__)