diff --git a/.github/workflows/bbp-ci.yml b/.github/workflows/bbp-ci.yml
index d9d64da..d4d5330 100644
--- a/.github/workflows/bbp-ci.yml
+++ b/.github/workflows/bbp-ci.yml
@@ -4,7 +4,7 @@ on: push
 
 jobs:
   bbp-build-linux:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version: [ "3.7", "3.8", "3.9", "3.10" ]