diff --git a/composer.json b/composer.json
index 9a1c147..5c6c0b2 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": ">=5.3",
-        "zendframework/zend-developer-tools": "^1.0",
+        "zendframework/zend-developer-tools": "^1.0 || ^2.0",
         "zendframework/zend-eventmanager": "^2.0"
     },
     "autoload": {