diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6b91bee..68a11a3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,10 @@ on:
 jobs:
 
   build:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, ubuntu-20.04]
+    runs-on: ${{ matrix.os }}
     env:
       BUILD_TYPE: Release