diff --git a/composer.json b/composer.json
index ec91073..aa7ca2b 100644
--- a/composer.json
+++ b/composer.json
@@ -16,14 +16,14 @@
     ],
     "require": {
         "php": "^8.1",
-        "silverstripe/framework": "^5",
-        "silverstripe/cms": "^5",
-        "silverstripe/reports": "^5"
+        "silverstripe/framework": "^6",
+        "silverstripe/cms": "^6",
+        "silverstripe/reports": "^6"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6",
         "squizlabs/php_codesniffer": "^3",
-        "silverstripe/subsites": "^3",
+        "silverstripe/subsites": "^4",
         "silverstripe/standards": "^1",
         "phpstan/extension-installer": "^1.3"
     },