I don't know

Author: albus522

.github/workflows/ci.yml

@@ -237,7 +237,7 @@ jobs:
     - name: Reinstall libpg
       if: ${{ matrix.ruby < '2.4' && contains(matrix.gemfile, 'postgresql') }}
       # version located via https://pkgs.org/search/?q=libpq5 and the Ubuntu 20.04 LTS package list
-      run: sudo apt-get update && sudo apt-get install -y --allow-downgrades libpq5=12.* && sudo apt-get install -y --allow-downgrades libpq-dev
+      run: sudo apt-get update && sudo apt-get install -y --allow-downgrades libpq5=12.22-0ubuntu0.20.04.1 && sudo apt-get install -y --allow-downgrades libpq-dev
     - uses: ruby/setup-ruby@v1
       env:
         BUNDLE_GEMFILE: ${{ matrix.gemfile }}