diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a0f7af0..1de6868 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,7 +4,7 @@ on: [ push, pull_request ]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
         with: