diff --git a/.commit-check.yml b/.commit-check.yml
index 15ac7e4..7d5e579 100644
--- a/.commit-check.yml
+++ b/.commit-check.yml
@@ -20,6 +20,6 @@ checks:
     suggest: run command `git config user.name "Your Name"`
 
   - check: author_email
-    regex: ^\S+@\S+\.\S+$
+    regex: ^.+@.+$
     error: The committer email seems invalid
     suggest: run command `git config user.email yourname@example.com`
diff --git a/.github/workflows/commit-check.yml b/.github/workflows/commit-check.yml
index 422d944..7ee0be4 100644
--- a/.github/workflows/commit-check.yml
+++ b/.github/workflows/commit-check.yml
@@ -8,17 +8,16 @@ on:
 jobs:
   commit-check:
     runs-on: ubuntu-latest
-    permissions:
+    permissions:  # use permissions because of use pr-comments
       contents: read
       pull-requests: write
-      repository-projects: write
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}
-      - uses: ./  # self test
+          ref: ${{ github.event.pull_request.head.sha }}  # checkout PR HEAD commit
+      - uses: ./ # self test
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # used by `pr-comments`
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # use GITHUB_TOKEN because of use pr-comments
         with:
           message: true
           branch: true
diff --git a/README.md b/README.md
index 1646fb9..c9a5963 100644
--- a/README.md
+++ b/README.md
@@ -23,17 +23,16 @@ on:
 jobs:
   commit-check:
     runs-on: ubuntu-latest
-    permissions:
+    permissions:  # use permissions because of use pr-comments
       contents: read
-      issues: write
       pull-requests: write
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }} # Checkout PR HEAD commit
+          ref: ${{ github.event.pull_request.head.sha }}  # checkout PR HEAD commit
       - uses: commit-check/commit-check-action@v1
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # use GITHUB_TOKEN because of use pr-comments
         with:
           message: true
           branch: true