diff --git a/.github/workflows/ratCheck.yml b/.github/workflows/ratCheck.yml
index ebb9ef50..0aa4410e 100644
--- a/.github/workflows/ratCheck.yml
+++ b/.github/workflows/ratCheck.yml
@@ -21,7 +21,7 @@ on:
 jobs:
   check:
     name: Rat Check 🐀
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     defaults:
       run:
         shell: bash