diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0dd231c190..208753313e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -413,7 +413,7 @@ jobs:
 
   format:
     name: Format
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v3
     - name: setup