diff --git a/.github/workflows/dex.yaml b/.github/workflows/dex.yaml
index 7667ed6..e6c2e76 100644
--- a/.github/workflows/dex.yaml
+++ b/.github/workflows/dex.yaml
@@ -63,7 +63,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
-      - uses: sigstore/cosign-installer@d7543c93d881b35a8faa02e8e3605f69b7a1ce62 # v3.10.0
+      - uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
         if: ${{ startsWith(github.ref, 'refs/tags/') }}
       - name: Sign the images with GitHub OIDC Token
         if: ${{ startsWith(github.ref, 'refs/tags/') }}