diff --git a/.github/workflows/core-checks.yml b/.github/workflows/core-checks.yml
index 7c78429101..343fa7f339 100644
--- a/.github/workflows/core-checks.yml
+++ b/.github/workflows/core-checks.yml
@@ -5,7 +5,7 @@ on: [pull_request]
 jobs:
   core-checker:
     name: FreeRTOS Core Checks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       # Install python 3
       - name: Tool Setup