diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index e88e991..ad5096f 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -27,6 +27,7 @@ jobs:
       - name: Install Poetry
         uses: snok/install-poetry@v1
         with:
+          version: 1.5.1
           virtualenvs-create: true
           virtualenvs-in-project: true