diff --git a/action.yml b/action.yml
index 97f4ac3..df3006d 100644
--- a/action.yml
+++ b/action.yml
@@ -20,7 +20,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
+    - uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
     - uses: astral-sh/setup-uv@eb1897b8dc4b5d5bfe39a428a8f2304605e0983c # v7.0.0
     - run: |
         cd $GITHUB_ACTION_PATH \