diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 42f1e3a76..56370035c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04-4core
     steps:
       - name: Checkout
         uses: actions/checkout@v3