diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a665d18..fe1765f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -31,7 +31,7 @@ jobs:
       - name: install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install tox
+          pip install tox==4.14.0
       - name: run tests
         run: tox
       - name: run extra checks