diff --git a/.github/workflows/pr_build.yml b/.github/workflows/pr_build.yml
index b7f95fe..45f92bc 100644
--- a/.github/workflows/pr_build.yml
+++ b/.github/workflows/pr_build.yml
@@ -11,7 +11,7 @@ env:
   TERM: xterm
 jobs:
   test-all:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     timeout-minutes: 30
     steps: 
       - name: Checkout