diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7e3703d..9180bc6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ concurrency:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Set up Go 1.x
         uses: actions/setup-go@v2