diff --git a/.github/workflows/QCD_workflow.yml b/.github/workflows/QCD_workflow.yml
index a29d8866..bebe5b19 100644
--- a/.github/workflows/QCD_workflow.yml
+++ b/.github/workflows/QCD_workflow.yml
@@ -11,7 +11,7 @@ on:
     - 'src/BTVNanoCommissioning/utils/*'
     - '.github/workflows/QCD_workflow.yml'
     
-  pull_request:
+  pull_request_target:
     branches: [ master ]
     paths:
     - 'src/BTVNanoCommissioning/workflows/*QCD*'
@@ -38,6 +38,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
+    - name: Merge PR locally
+      if: github.event_name == 'pull_request_target'
+      run: |
+        git fetch origin ${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }}
+        git checkout ${{ github.event.pull_request.base.ref }}
+        git merge --no-ff ${{ github.event.pull_request.head.sha }}
     
     - uses: cvmfs-contrib/github-action-cvmfs@v4
       with:
diff --git a/.github/workflows/ctag_DY_workflow.yml b/.github/workflows/ctag_DY_workflow.yml
index 9297eaa8..a99ee5a5 100644
--- a/.github/workflows/ctag_DY_workflow.yml
+++ b/.github/workflows/ctag_DY_workflow.yml
@@ -10,7 +10,7 @@ on:
     - 'src/BTVNanoCommissioning/helpers/definitions.py'
     - 'src/BTVNanoCommissioning/utils/*'
     - '.github/workflows/ctag_DY_workflow.yml'
-  pull_request:
+  pull_request_target:
     branches: [ master ]
     paths:
     - 'src/BTVNanoCommissioning/workflows/ctag_*DY*'
@@ -36,6 +36,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
+    - name: Merge PR locally
+      if: github.event_name == 'pull_request_target'
+      run: |
+        git fetch origin ${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }}
+        git checkout ${{ github.event.pull_request.base.ref }}
+        git merge --no-ff ${{ github.event.pull_request.head.sha }}
     
     - uses: cvmfs-contrib/github-action-cvmfs@v4
       with:
diff --git a/.github/workflows/ctag_Wc_workflow.yml b/.github/workflows/ctag_Wc_workflow.yml
index 3e672084..e1897381 100644
--- a/.github/workflows/ctag_Wc_workflow.yml
+++ b/.github/workflows/ctag_Wc_workflow.yml
@@ -11,7 +11,7 @@ on:
     - 'src/BTVNanoCommissioning/utils/*'
     - '.github/workflows/ctag_Wc_workflow.yml'
     
-  pull_request:
+  pull_request_target:
     branches: [ master ]
     paths:
     - 'src/BTVNanoCommissioning/workflows/ctag_*Wc*'
@@ -38,6 +38,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
+    - name: Merge PR locally
+      if: github.event_name == 'pull_request_target'
+      run: |
+        git fetch origin ${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }}
+        git checkout ${{ github.event.pull_request.base.ref }}
+        git merge --no-ff ${{ github.event.pull_request.head.sha }}
     
     - uses: cvmfs-contrib/github-action-cvmfs@v4
       with:
diff --git a/.github/workflows/ctag_ttbar_workflow.yml b/.github/workflows/ctag_ttbar_workflow.yml
index 816bf2eb..eada9f37 100644
--- a/.github/workflows/ctag_ttbar_workflow.yml
+++ b/.github/workflows/ctag_ttbar_workflow.yml
@@ -10,7 +10,7 @@ on:
     - 'src/BTVNanoCommissioning/helpers/definitions.py'
     - 'src/BTVNanoCommissioning/utils/*'
     - '.github/workflows/ctag_ttbar_workflow.yml'
-  pull_request:
+  pull_request_target:
     branches: [ master ]
     paths:
     - 'src/BTVNanoCommissioning/workflows/ctag*tt*'
@@ -37,6 +37,13 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     
+    - name: Merge PR locally
+      if: github.event_name == 'pull_request_target'
+      run: |
+        git fetch origin ${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }}
+        git checkout ${{ github.event.pull_request.base.ref }}
+        git merge --no-ff ${{ github.event.pull_request.head.sha }}
+        
     - uses: cvmfs-contrib/github-action-cvmfs@v4
       with:
         cvmfs_repositories: 'grid.cern.ch'
diff --git a/.github/workflows/ttbar_workflow.yml b/.github/workflows/ttbar_workflow.yml
index 1e1d5e2e..3df5f01e 100644
--- a/.github/workflows/ttbar_workflow.yml
+++ b/.github/workflows/ttbar_workflow.yml
@@ -10,7 +10,7 @@ on:
     - 'src/BTVNanoCommissioning/helpers/definitions.py'
     - 'src/BTVNanoCommissioning/utils/*'
     - '.github/workflows/ttbar_workflow.yml'
-  pull_request:
+  pull_request_target:
     branches: [ master ]
     paths:
     - 'src/BTVNanoCommissioning/workflows/tt*'
@@ -36,6 +36,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
+    - name: Merge PR locally
+      if: github.event_name == 'pull_request_target'
+      run: |
+        git fetch origin ${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }}
+        git checkout ${{ github.event.pull_request.base.ref }}
+        git merge --no-ff ${{ github.event.pull_request.head.sha }}
     
     - uses: cvmfs-contrib/github-action-cvmfs@v4
       with:
diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index dec3ad7d..a2dc19e4 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -10,7 +10,7 @@ on:
     - 'src/BTVNanoCommissioning/helpers/definitions.py'
     - 'src/BTVNanoCommissioning/utils/*'
     - '.github/workflows/validation.yml'
-  pull_request:
+  pull_request_target:
     branches: [ master ]
     paths:
     - 'src/BTVNanoCommissioning/workflows/validation.py'
@@ -36,6 +36,13 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
+    - name: Merge PR locally
+      if: github.event_name == 'pull_request_target'
+      run: |
+        git fetch origin ${{ github.event.pull_request.base.ref }}:refs/remotes/origin/${{ github.event.pull_request.base.ref }}
+        git checkout ${{ github.event.pull_request.base.ref }}
+        git merge --no-ff ${{ github.event.pull_request.head.sha }}
     
     - uses: cvmfs-contrib/github-action-cvmfs@v4
       with: