diff --git a/.github/workflows/rspec.yml b/.github/workflows/rspec.yml
index fa9e090f9..0280f5cab 100644
--- a/.github/workflows/rspec.yml
+++ b/.github/workflows/rspec.yml
@@ -34,7 +34,11 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: false
-    - run: bundle install
+    - name: Select bundler
+      if: startsWith(matrix.ruby-version, '2')
+      run: gem install bundler -v 2.4.22
+    - name: Install gems
+      run: bundle install
     - name: Set up yardocs
       run: bundle exec yard gems
     - name: Run tests