diff --git a/.github/workflows/appbuild.yml b/.github/workflows/appbuild.yml
index 78daaf253..34a5c149e 100644
--- a/.github/workflows/appbuild.yml
+++ b/.github/workflows/appbuild.yml
@@ -5,8 +5,7 @@ on:
 
 jobs:
   build:
-
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
 
     strategy:
       matrix: