diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2285e4a..bacca65 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,7 +43,7 @@ jobs:
         run: |
           set -euo pipefail
           python3 -m pip install --upgrade pip
-          python3 -m pip install pytest ruff
+          python3 -m pip install pytest ruff==0.15.22
           python3 -m pip check
           python3 -m ruff check .
           python3 -m pytest tests ops/quant-monitor/tests -q