diff --git a/Gemfile b/Gemfile
index 7292178de..39f00f007 100644
--- a/Gemfile
+++ b/Gemfile
@@ -134,7 +134,7 @@ group :development do
   gem 'letter_opener', '~> 1.7'
   gem 'letter_opener_web', '~> 1.4'
   gem 'memory_profiler'
-  gem 'rubocop', '~> 1.20', require: false
+  gem 'rubocop', '~> 1.21', require: false
   gem 'rubocop-rails', '~> 2.11', require: false
   gem 'brakeman', '~> 5.1', require: false
   gem 'bundler-audit', '~> 0.8', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index ab76999a8..c889371e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -522,7 +522,7 @@ GEM
     rspec-support (3.10.2)
     rspec_junit_formatter (0.4.1)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (1.20.0)
+    rubocop (1.21.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)
@@ -766,7 +766,7 @@ DEPENDENCIES
   rspec-rails (~> 5.0)
   rspec-sidekiq (~> 3.1)
   rspec_junit_formatter (~> 0.4)
-  rubocop (~> 1.20)
+  rubocop (~> 1.21)
   rubocop-rails (~> 2.11)
   ruby-progressbar (~> 1.11)
   sanitize (~> 6.0)