diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index aa6f3d7..ef361a4 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -27,7 +27,8 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install tox tox-gh-actions poetry
+          python -m pip install tox tox-gh-actions
+          pipx install poetry==1.7.0
           poetry install -v
       - name: Test with tox
         run: tox r