diff --git a/.github/workflows/chart-release.yml b/.github/workflows/chart-release.yml
index efc77c4..fccad69 100644
--- a/.github/workflows/chart-release.yml
+++ b/.github/workflows/chart-release.yml
@@ -41,6 +41,13 @@ jobs:
       - name: Install cosign
         uses: sigstore/cosign-installer@v4.1.2
 
+      - name: Log in to ghcr.io for cosign
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Package and push chart to ghcr.io (OCI)
         id: oci_push
         env: