diff --git a/Gemfile b/Gemfile
index 361552a243..0247fa4d38 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,7 @@ gem 'nokogiri', '>= 1.11.1'
 gem 'rake', '>= 12.3.3'
 gem 'otr-activerecord', '>= 1.4.2'
 gem 'sqlite3'
-gem 'rubocop', '~> 1.20.0', require: false
+gem 'rubocop', '~> 1.21.0', require: false
 
 # Geolocation support
 group :geoip do