diff --git a/.github/workflows/publish-executor-package.yml b/.github/workflows/publish-executor-package.yml
index f3ce33a72..2ef813a67 100644
--- a/.github/workflows/publish-executor-package.yml
+++ b/.github/workflows/publish-executor-package.yml
@@ -62,7 +62,9 @@ jobs:
 
       - name: Update npm for trusted publishing
         run: |
-          npm install -g npm@latest
+          # npm 12.0.0 fails `publish --provenance` with "Cannot find module
+          # 'sigstore'" (npm/cli#9722); 11.x supports trusted publishing and works.
+          npm install -g npm@11
           npm --version
 
       - name: Install dependencies
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 76ca85193..241d4757f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -42,7 +42,9 @@ jobs:
 
       - name: Update npm for trusted publishing
         run: |
-          npm install -g npm@latest
+          # npm 12.0.0 fails `publish --provenance` with "Cannot find module
+          # 'sigstore'" (npm/cli#9722); 11.x supports trusted publishing and works.
+          npm install -g npm@11
           npm --version
 
       - name: Install dependencies