diff --git a/composer.json b/composer.json
index 10b5c5f..aee69da 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         "symbiote/silverstripe-advancedworkflow": "7.x-dev"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6"
+        "phpunit/phpunit": "^11.3"
     },
     "suggest": {
         "silverstripe/versionfeed": "Provides an RSS feed for global site changes"