diff --git a/Gemfile b/Gemfile
index 4b802c0b3..dd7c84d78 100644
--- a/Gemfile
+++ b/Gemfile
@@ -139,7 +139,7 @@ group :development do
   gem 'letter_opener_web', '~> 1.4'
   gem 'memory_profiler'
   gem 'rubocop', '~> 1.7', require: false
-  gem 'rubocop-rails', '~> 2.8', require: false
+  gem 'rubocop-rails', '~> 2.9', require: false
   gem 'brakeman', '~> 4.10', require: false
   gem 'bundler-audit', '~> 0.7', require: false
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 21fea60a8..51821f0e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -546,10 +546,10 @@ GEM
       unicode-display_width (>= 1.4.0, < 2.0)
     rubocop-ast (1.3.0)
       parser (>= 2.7.1.5)
-    rubocop-rails (2.8.1)
+    rubocop-rails (2.9.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 0.87.0)
+      rubocop (>= 0.90.0, < 2.0)
     ruby-progressbar (1.10.1)
     ruby-saml (1.11.0)
       nokogiri (>= 1.5.10)
@@ -784,7 +784,7 @@ DEPENDENCIES
   rspec-sidekiq (~> 3.1)
   rspec_junit_formatter (~> 0.4)
   rubocop (~> 1.7)
-  rubocop-rails (~> 2.8)
+  rubocop-rails (~> 2.9)
   ruby-progressbar (~> 1.10)
   sanitize (~> 5.2)
   scenic (~> 1.5)