diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index 88433e8d1..12982e9b7 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -35,11 +35,11 @@ jobs:
             nimflags-extra: --mm:refc
           - target:
               os: linux
-            builder: ubuntu-20.04
+            builder: ['self-hosted','ubuntu-22.04']
             shell: bash
           - target:
               os: macos
-            builder: macos-11
+            builder: macos-12
             shell: bash
           - target:
               os: windows