diff --git a/.github/workflows/sync-langs.yml b/.github/workflows/sync-langs.yml
index 5b1162a..8ce809a 100644
--- a/.github/workflows/sync-langs.yml
+++ b/.github/workflows/sync-langs.yml
@@ -9,7 +9,7 @@ jobs:
   sync:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
       - name: Sync language features
         run: python scripts/sync-langs.py