diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 114baa5..270dcf6 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -8,6 +8,9 @@ on:
       - "book/**"
       - ".github/workflows/**"
 
+permissions:
+  contents: write
+
 defaults:
   run:
     shell: bash