diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 578f759..5916db6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,7 @@ on:
   pull_request:
     branches:
       - main
+permissions: {}
 jobs:
   test:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/release-tag.yml b/.github/workflows/release-tag.yml
index 9cf39cd..6a9abc2 100644
--- a/.github/workflows/release-tag.yml
+++ b/.github/workflows/release-tag.yml
@@ -9,6 +9,8 @@ jobs:
   build:
     name: Create Release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write # for yyx990803/release-tag to create a release tag
     steps:
       - name: Checkout code
         uses: actions/checkout@v5