diff --git a/composer.json b/composer.json
index 8068fa6..5851fd6 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "require": {
         "php": "^7.1",
         "lcobucci/jwt": "^3.3",
-        "doctrine/orm": "^2.7",
+        "doctrine/orm": ">2.6 <=2.7.4",
         "laminas/laminas-permissions-acl": "^2.7",
         "zendframework/zend-authentication": "^2.7",
         "zendframework/zend-servicemanager": "^3.4",