diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 808900d39..fa116a4e0 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -2,7 +2,7 @@ name: Lint
 on: [push, pull_request]
 jobs:
   Python:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       max-parallel: 2
       matrix: