diff --git a/.github/workflows/build-boxkit.yml b/.github/workflows/build-boxkit.yml
index b104b247..1a31d64a 100644
--- a/.github/workflows/build-boxkit.yml
+++ b/.github/workflows/build-boxkit.yml
@@ -89,7 +89,7 @@ jobs:
             
       # Sign container
       - name: Install cosign
-        uses: sigstore/cosign-installer@d7543c93d881b35a8faa02e8e3605f69b7a1ce62 # v3.10.0
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
 
       - name: Sign container image
         if: github.event_name != 'pull_request'