diff --git a/.github/workflows/on_tag_do_release_and_deploy_pypi.yml b/.github/workflows/on_tag_do_release_and_deploy_pypi.yml
index 4aad925..cb1d2a8 100644
--- a/.github/workflows/on_tag_do_release_and_deploy_pypi.yml
+++ b/.github/workflows/on_tag_do_release_and_deploy_pypi.yml
@@ -20,6 +20,7 @@ jobs:
       - name: Install pytest + dependancies
         run: |
             python -m pip install --upgrade pip poetry
+            poetry lock
             poetry install --with dev
 
       - name: Test with pytest