diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e74db811..8fa36e99 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   build:
     name: build-linux
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
 
     steps: