diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2150c004..62708ed7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,11 +46,7 @@ jobs:
       # publishes no moving major tag past v3, so @v4 does not resolve.
       - uses: astral-sh/ruff-action@v4.1.0
         with:
-          # There is no pyproject.toml for the action to read a version from,
-          # so pin it here: an unpinned ruff would resolve to `latest` and a
-          # new release could turn a green branch red on its own. Bump this
-          # deliberately, together with the rule set in ruff.toml.
-          version: 0.15.21
+          version: latest
           # Rule selection, file discovery (the many extensionless Python
           # executables) and exclusions all live in ruff.toml, so the whole
           # workspace can be handed over as-is.