diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7107e84..f4bad5d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,10 +21,10 @@ jobs:
     strategy:
       matrix:
         test:
-          - {pgver: "12", os: "ubuntu-latest"}
           - {pgver: "14", os: "ubuntu-latest"}
           - {pgver: "16", os: "ubuntu-latest"}
-          - {pgver: "16", os: "macos-latest"}
+          - {pgver: "18", os: "ubuntu-latest"}
+          - {pgver: "18", os: "macos-latest"}
     steps:
       - name: "Checkout"
         uses: actions/checkout@v4
@@ -71,18 +71,18 @@ jobs:
         if: ${{runner.os == 'macOS'}}
         run: |
           echo "::group::install"
-          brew install patchutils gnu-sed docutils libevent postgresql@${{matrix.test.pgver}} autoconf automake
+          brew install patchutils gnu-sed docutils libevent postgresql@${{matrix.test.pgver}} autoconf automake libtool
           echo "::endgroup::"
           echo "/usr/local/opt/docutils/bin" >> $GITHUB_PATH
           echo "/usr/local/opt/postgresql@${{matrix.test.pgver}}/bin" >> $GITHUB_PATH
           echo "SED=gsed" >> $GITHUB_ENV
-          echo "RST2MAN=rst2man.py" >> $GITHUB_ENV
+          echo "RST2MAN=rst2man" >> $GITHUB_ENV
 
       - name: "Build"
         run: |
           ./autogen.sh
           ./configure --prefix=${GITHUB_WORKSPACE}/testinstall
-          make RST2MAN=${{env.RST2MAN}}
+          make RST2MAN=${RST2MAN}
           make install
 
       - name: "Install PgQ"