diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0f26ad9..86f78bb 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   run:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     strategy:
       #for each of the following versions of PHP, with and without --prefer-lowest
       matrix: