diff --git a/.github/workflows/backend.yml b/.github/workflows/backend.yml
index 0480527..7f7397a 100644
--- a/.github/workflows/backend.yml
+++ b/.github/workflows/backend.yml
@@ -4,9 +4,6 @@
 name: Backend
 
 on:
-  push:
-    branches:
-      - main
   pull_request_target:
     branches:
       - main
@@ -18,6 +15,8 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
+      with:
+        ref: ${{ github.event.pull_request.head.sha }}
 
     - name: Install Node.js
       uses: actions/setup-node@v2
diff --git a/.github/workflows/frontend.yml b/.github/workflows/frontend.yml
index 703bbaa..65909fb 100644
--- a/.github/workflows/frontend.yml
+++ b/.github/workflows/frontend.yml
@@ -4,9 +4,6 @@
 name: Frontend
 
 on:
-  push:
-    branches:
-      - main
   pull_request_target:
     branches:
       - main
@@ -18,6 +15,8 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
+      with:
+        ref: ${{ github.event.pull_request.head.sha }}
 
     - name: Install Node.js
       uses: actions/setup-node@v2