diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e5adf2a..92c6660 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
       # Reads .mise.toml, which is where bun's version is pinned -- the same
       # arrangement the four sibling -web repos use. This repository was the odd
       # one out on pnpm with no .mise.toml at all.
-      - uses: jdx/mise-action@c37c93293d6b742fc901e1406b8f764f6fb19dac # v2
+      - uses: jdx/mise-action@2d8d4cafcbd33be2ea37d2b6f5ad595363d1f1ca # v5.1.1
 
       - name: Validate developer profile and workflow controls
         uses: nicodes/tools/workflow-standards@cf0e560c9bbb888488191fcce03409b6c6fbdc28 # v0.13.0