diff --git a/.github/workflows/publish-charts.yml b/.github/workflows/publish-charts.yml
index c4325a9..748980f 100644
--- a/.github/workflows/publish-charts.yml
+++ b/.github/workflows/publish-charts.yml
@@ -46,7 +46,7 @@ jobs:
       chart-digest: ${{ steps.helm_publish.outputs.digest }}
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
+      - uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
       - name: "Extract Version"
         id: extract_version
         run: |
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 09948cb..5e1afa1 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -31,7 +31,7 @@ jobs:
 
       - uses: creekorful/goreportcard-action@1f35ced8cdac2cba28c9a2f2288a16aacfd507f9 # v1.0
 
-      - uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
+      - uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
 
       - uses: anchore/sbom-action/download-syft@f325610c9f50a54015d37c8d16cb3b0e2c8f4de0 #v0.18.0