diff --git a/.github/workflows/checkstyle.yaml b/.github/workflows/checkstyle.yaml
index 1707f5bb21..8dcd5047a7 100644
--- a/.github/workflows/checkstyle.yaml
+++ b/.github/workflows/checkstyle.yaml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   checkstyle:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v2
       with: