diff --git a/.github/workflows/backports.yaml b/.github/workflows/backports.yaml
index 0993ca8..a71cb55 100644
--- a/.github/workflows/backports.yaml
+++ b/.github/workflows/backports.yaml
@@ -25,7 +25,7 @@ jobs:
         startsWith(github.event.comment.body, '/backport')
       )
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           token: ${{ secrets.VEXXHOST_BOT_PAT }}
       - uses: korthout/backport-action@436145e922f9561fc5ea157ff406f21af2d6b363 # v3.2.0