diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 72ae69e..0f33e32 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -15,9 +15,17 @@ jobs:
         uses: actions/checkout@v4
       - name: Lint
         uses: astral-sh/ruff-action@v3
+        with:
+          # Pin the ruff version so CI matches what contributors resolve
+          # locally. ruff-action defaults to the latest release, which drifts
+          # (e.g. 0.16.0 enabled stricter rules that flag pre-existing code)
+          # and turns green PRs red without any code change. Bump this
+          # deliberately alongside any lint fixes.
+          version: "0.15.12"
       - name: Format
         uses: astral-sh/ruff-action@v3
         with:
+          version: "0.15.12"
           args: "format --check"
   ty:
     name: Ty