diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index e3d0c7a9e..0aba30a2e 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -14,7 +14,7 @@ jobs:
       github.event.workflow_run.head_branch == 'master' &&
       github.event.workflow_run.event == 'push' &&
       github.repository == 'rwth-i6/returnn'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v3