diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a9b430b..b249152 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   build-deploy:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2