diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/pythonapp.yml
index 8e92ea0ed7..7eef0267dd 100644
--- a/.github/workflows/pythonapp.yml
+++ b/.github/workflows/pythonapp.yml
@@ -15,6 +15,10 @@ jobs:
   flake8-py3:
     runs-on: ubuntu-latest
     steps:
+    - name: Cancel Previous Jobs
+      uses: styfle/cancel-workflow-action@0.7.0
+      with:
+        access_token: ${{ github.token }}
     - uses: actions/checkout@v2
     - name: Set up Python 3.8
       uses: actions/setup-python@v2
@@ -184,6 +188,10 @@ jobs:
       options: --gpus all
     runs-on: [self-hosted, linux, x64, common]
     steps:
+    - name: Cancel Previous Self-hosted Runs
+      uses: styfle/cancel-workflow-action@0.7.0
+      with:
+        access_token: ${{ github.token }}
     - uses: actions/checkout@v2
     - name: apt install
       run: |