diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 281008ef13..3ac81587a6 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -12,8 +12,17 @@ jobs:
       uses: ruby/setup-ruby@v1
       with:
         ruby-version: 2.7
-    - name: Install RuboCop gems
+    - name: Cache gems
+      uses: actions/cache@v1
+      with:
+        path: vendor/bundle
+        key: ${{ runner.os }}-rubocop-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-rubocop-
+    - name: Install gems
       run: |
-        gem install --no-document rubocop rubocop-performance rubocop-rails
+        bundle config path vendor/bundle
+        bundle config set without 'default doc job cable storage ujs test db'
+        bundle install --jobs 4 --retry 3
     - name: Run RuboCop
-      run: rubocop --parallel
+      run: bundle exec rubocop --parallel
diff --git a/Gemfile b/Gemfile
index b2d8f1ec05..615a1d959f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,9 +28,11 @@ gem "uglifier", ">= 1.3.0", require: false
 # Explicitly avoid 1.x that doesn't support Ruby 2.4+
 gem "json", ">= 2.0.0"
 
-gem "rubocop", ">= 0.47", require: false
-gem "rubocop-performance", require: false
-gem "rubocop-rails", require: false
+group :rubocop do
+  gem "rubocop", ">= 0.47", require: false
+  gem "rubocop-performance", require: false
+  gem "rubocop-rails", require: false
+end
 
 group :doc do
   gem "sdoc", "~> 1.1"