diff --git a/.github/workflows/build-image.yml b/.github/workflows/build-image.yml
index 9763841..480336a 100644
--- a/.github/workflows/build-image.yml
+++ b/.github/workflows/build-image.yml
@@ -58,7 +58,7 @@ jobs:
         uses: docker/setup-buildx-action@v3.11.1
       -
         name: Install Cosign
-        uses: sigstore/cosign-installer@v3.10.0
+        uses: sigstore/cosign-installer@v4.0.0
       -
         name: Login to GitHub Container Registry
         uses: docker/login-action@v3.6.0
diff --git a/.github/workflows/build-split-image.yml b/.github/workflows/build-split-image.yml
index 10c6ec5..03568d2 100644
--- a/.github/workflows/build-split-image.yml
+++ b/.github/workflows/build-split-image.yml
@@ -161,7 +161,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       -
         name: Install Cosign
-        uses: sigstore/cosign-installer@v3.10.0
+        uses: sigstore/cosign-installer@v4.0.0
       -
         name: Create image tags
         id: image_tags