diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 442be6afe..3904119b6 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -4,7 +4,7 @@ on: [ push ]
 
 jobs:
   build-ubuntu:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v2