diff --git a/.github/workflows/backfill-attestations.yml b/.github/workflows/backfill-attestations.yml
index 0f637948..cb2c3e94 100644
--- a/.github/workflows/backfill-attestations.yml
+++ b/.github/workflows/backfill-attestations.yml
@@ -15,7 +15,7 @@ jobs:
       id-token: write
     steps:
       - name: Install cosign
-        uses: sigstore/cosign-installer@398d4b0eeef1380460a10c8013a76f728fb906ac # v3
+        uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003 # v4.1.1
 
       - name: Sign release artifacts
         env: