diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 3ef2b995f..7c72677e6 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -13,7 +13,7 @@ on:
   #     - master
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     # Start a separate docker container that we can contact over TCP (for tests)
     # Apparently there's something tricky going on with the port binding though
     # https://help.github.com/en/articles/workflow-syntax-for-github-actions#jobsjob_idservices