diff --git a/.github/workflows/test-hmmer-py.yml b/.github/workflows/test-hmmer-py.yml
index 1c5c5fa..383a13f 100644
--- a/.github/workflows/test-hmmer-py.yml
+++ b/.github/workflows/test-hmmer-py.yml
@@ -22,6 +22,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
+      - name: Install autoconf on macos-14
+        if: matrix.os == 'macos-14'
+        run: brew install autoconf
+
       - name: Run tests
         run: |
           pipx run poetry install