diff --git a/.github/workflows/python-package-conda.yml b/.github/workflows/python-package-conda.yml
index 563cad6c..1507cca2 100644
--- a/.github/workflows/python-package-conda.yml
+++ b/.github/workflows/python-package-conda.yml
@@ -4,7 +4,7 @@ on: [push]
 
 jobs:
   build-linux:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       max-parallel: 5
     steps: