diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index d35540f..405202a 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -48,7 +48,9 @@ jobs:
           echo "$HOME/.local/bin" >> $GITHUB_PATH
 
       - name: Install dependencies
-        run: poetry install --with dev,test
+        run: |
+          poetry lock --no-update
+          poetry install --with dev,test
 
       - name: Lint
         run: make lint