Update main.yml
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ce803c8..effd6ae 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,7 +6,7 @@
   update-symbols:
     permissions:
       contents: write
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04-4core
     strategy:
       fail-fast: false
     steps: