diff --git a/.github/workflows/black_check.yml b/.github/workflows/black_check.yml
index a36b5f2..5350f98 100644
--- a/.github/workflows/black_check.yml
+++ b/.github/workflows/black_check.yml
@@ -4,12 +4,12 @@
 # https://github.com/cclauss/autoblack
 
 name: black
-on: [push, pull_request]
+on: [pull_request]
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with: