diff --git a/.github/workflows/rspec_rubocop.yml b/.github/workflows/rspec_rubocop.yml
index 107aa7c..3d88b03 100644
--- a/.github/workflows/rspec_rubocop.yml
+++ b/.github/workflows/rspec_rubocop.yml
@@ -15,21 +15,37 @@ defaults:
 jobs:
   test:
     runs-on: ubuntu-latest
+    container: ubuntu:focal
     strategy:
       matrix:
-        include: # use bundler 2.3 for ruby versions < 2.6 (https://bundler.io/compatibility.html)
+        include: # https://bundler.io/compatibility.html
         - ruby-version: '2.6'
-          bundler-version: latest
+          bundler-version: '2.4'
         - ruby-version: '2.7'
-          bundler-version: latest
+          bundler-version: '2.4'
         - ruby-version: '3.0'
           bundler-version: latest
         - ruby-version: '3.1'
           bundler-version: latest
+        - ruby-version: '3.2'
+          bundler-version: latest
     steps:
     - uses: actions/checkout@v3
+    - name: Install dependencies
+      run: |
+        apt-get update
+        apt-get install -y \
+          automake \
+          g++ \
+          libtool \
+          make \
+          pkg-config \
+          cmake \
+          ccache \
+          libssl-dev \
+          libyaml-dev
     - name: Set up Ruby
-      uses: ruby/setup-ruby@ee2113536afb7f793eed4ce60e8d3b26db912da4 # v1.127.0
+      uses: ruby/setup-ruby@v1.143.0
       with:
         ruby-version: ${{ matrix.ruby-version }}
         bundler: ${{ matrix.bundler-version }}