diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cca9982..573f236 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,10 +9,10 @@ jobs:
     - uses: actions/checkout@v2
     - name: Set up Python
       uses: actions/setup-python@v2
-      with:
-        python-version: '3.9'
-    - name: Install deps
-      uses: knowsuchagency/poetry-install@v1
+    - run: |
+        pip install -U pip
+        pip install poetry
+        poetry install
       env:
         POETRY_VIRTUALENVS_CREATE: false
     - name: Run black check
@@ -23,10 +23,10 @@ jobs:
     - uses: actions/checkout@v2
     - name: Set up Python
       uses: actions/setup-python@v2
-      with:
-        python-version: '3.9'
-    - name: Install deps
-      uses: knowsuchagency/poetry-install@v1
+    - run: |
+        pip install -U pip
+        pip install poetry
+        poetry install
       env:
         POETRY_VIRTUALENVS_CREATE: false
     - name: Run flake8 check