diff --git a/.github/workflows/build_canary.yml b/.github/workflows/build_canary.yml
index b22a1f87..a921b59c 100644
--- a/.github/workflows/build_canary.yml
+++ b/.github/workflows/build_canary.yml
@@ -43,7 +43,7 @@ jobs:
 
       # https://github.com/sigstore/cosign-installer
       - name: Install Cosign
-        uses: sigstore/cosign-installer@d7543c93d881b35a8faa02e8e3605f69b7a1ce62 # v3.10.0
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
 
       - name: Check Cosign install!
         run: cosign version
diff --git a/.github/workflows/build_release.yml b/.github/workflows/build_release.yml
index 4e53f164..92c72311 100644
--- a/.github/workflows/build_release.yml
+++ b/.github/workflows/build_release.yml
@@ -49,7 +49,7 @@ jobs:
 
       # https://github.com/sigstore/cosign-installer
       - name: Install Cosign
-        uses: sigstore/cosign-installer@d7543c93d881b35a8faa02e8e3605f69b7a1ce62 # v3.10.0
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
 
       - name: Check Cosign install!
         run: cosign version