diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4ab0365..90da6cb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   buildlinux:
     name: Linux x64
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-18.04
 
     steps:
       - name: Prepare Environment