diff --git a/.github/workflows/build-unit-tests.yaml b/.github/workflows/build-unit-tests.yaml
index ca45ecd2c6..1bd4388ea6 100644
--- a/.github/workflows/build-unit-tests.yaml
+++ b/.github/workflows/build-unit-tests.yaml
@@ -4,7 +4,7 @@ on: [push,pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     
     steps:
     - uses: actions/checkout@v1