diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7145103d..f9dd5a01 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install flake8
+          pip install flake8==6.0
       - name: Check Python code quality
         run: flake8 --exclude docs/conf.py --max-line-length=100