diff --git a/.github/workflows/prettier.yaml b/.github/workflows/prettier.yaml
index 596db3bf9..3f0ab09f6 100644
--- a/.github/workflows/prettier.yaml
+++ b/.github/workflows/prettier.yaml
@@ -3,6 +3,7 @@ on: [push, pull_request]
 
 jobs:
   build:
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1