Fixes #59

Author: samsonasik

composer.json

@@ -40,7 +40,7 @@
     ],
     "require": {
         "php": "^7.1",
-        "beberlei/assert": "^2.9",
+        "beberlei/assert": "^2.9 || ^3.0",
         "psr/container": "^1.0",
         "seld/jsonlint": "^1.5",
         "zendframework/zend-db": "^2.5",