diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 71b790b..92b9c9c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: write
+      id-token: write
+      attestations: write
     steps:
       - uses: actions/checkout@v4
         with:
@@ -54,6 +56,14 @@ jobs:
         if: steps.check.outputs.exists == 'false'
         run: npm run build
 
+      - name: Attest build provenance
+        if: steps.check.outputs.exists == 'false'
+        uses: actions/attest-build-provenance@v2
+        with:
+          subject-path: |
+            main.js
+            styles.css
+
       - name: Tag and create release
         if: steps.check.outputs.exists == 'false'
         env: