diff --git a/.github/workflows/auto-author-assign.yml b/.github/workflows/auto-author-assign.yml
index 85901ce7..52314965 100644
--- a/.github/workflows/auto-author-assign.yml
+++ b/.github/workflows/auto-author-assign.yml
@@ -1,7 +1,7 @@
 name: Auto Author Assign
 
 on:
-  pull_request_target:
+  pull_request:
     types: [ opened, reopened ]
 
 permissions:
@@ -9,6 +9,7 @@ permissions:
 
 jobs:
   assign-author:
+    if: github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
     steps:
       - uses: toshimaru/auto-author-assign@v2.1.0
diff --git a/.github/workflows/dependent-issues.yml b/.github/workflows/dependent-issues.yml
index 3ca867b0..90d9c75c 100644
--- a/.github/workflows/dependent-issues.yml
+++ b/.github/workflows/dependent-issues.yml
@@ -7,7 +7,7 @@ on:
       - edited
       - closed
       - reopened
-  pull_request_target:
+  pull_request:
     types:
       - opened
       - edited
@@ -20,6 +20,7 @@ on:
 
 jobs:
   check:
+    if: github.event_name == 'issues' || github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
     env:
       # z0al/dependent-issues@v1.5.2 targets Node.js 20; allow it to run on