diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 618d3a97..a530791c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ jobs:
         runtime: [ linux-x64, linux-arm64, win-x64, osx-x64 ]
         include:
         - runtime: linux-x64
-          os: ubuntu-latest
+          os: ubuntu-18.04
 
         - runtime: linux-arm64
           os: ubuntu-latest