diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index ff6a1ce..d0ea76e 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -13,6 +13,11 @@ jobs:
     runs-on: ubuntu-latest
     container: ruby:2.7.2
 
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+
     environment:
       name: github-pages
       url: ${{steps.deployment.outputs.page_url}}