diff --git a/.github/workflows/push-helm-chart.yaml b/.github/workflows/push-helm-chart.yaml
index 20953b4..2361bb9 100644
--- a/.github/workflows/push-helm-chart.yaml
+++ b/.github/workflows/push-helm-chart.yaml
@@ -73,7 +73,7 @@ jobs:
           exit 1
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.10.1
+        uses: sigstore/cosign-installer@v4.0.0
 
       - name: Login to GHCR Registry
         uses: docker/login-action@v3