diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index cdfb9d55e4..08928fc114 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -11,6 +11,7 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.5
+      - run: 'gem install activesupport -v 6.1.4.4'
       - name: Rubocop linter
         uses: reviewdog/action-rubocop@v1
         with: