diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7666071..6f427ee 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,4 +1,4 @@
-name: build Linux
+name: build
 
 on: workflow_dispatch
 
@@ -7,7 +7,7 @@ jobs:
   build:
     name: build
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
 
     steps:
     - uses: actions/checkout@v2