diff --git a/composer.json b/composer.json
index b7a0f44..a37a36b 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "ibexa/templated-uri-router": "^2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.8.36|^5.0|^6.0|^7.0"
+        "phpunit/phpunit": "^4.8.36 || ^5.6.3 || ^6.0 || ^7.0"
     },
     "autoload": {
         "psr-0": { "Hautelook\\TemplatedUriBundle": "" }