diff --git a/.github/workflows/Downgrade.yml b/.github/workflows/Downgrade.yml
index 8e5eb5616..a7ccf8ea4 100644
--- a/.github/workflows/Downgrade.yml
+++ b/.github/workflows/Downgrade.yml
@@ -12,6 +12,7 @@ on:
       - 'docs/**'
 jobs:
   test:
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         version: ['1']