diff --git a/src/org/nameapi/client/services/ServiceFactory.php b/src/org/nameapi/client/services/ServiceFactory.php
index <HASH>..<HASH> 100644
--- a/src/org/nameapi/client/services/ServiceFactory.php
+++ b/src/org/nameapi/client/services/ServiceFactory.php
@@ -81,7 +81,7 @@ class ServiceFactory {
             $this->host = $host;
         }
         if ($apiVersion==null) {
-            $this->apiVersion = '5.3';
+            $this->apiVersion = '5.0';
         } else {
             $this->apiVersion = $apiVersion;
         }
Reverting default service version in class ServiceFactory for URL to <I> because the current production host api.nameapi.org does not offer th <I> yet, only the rc<I>-api.nameapi.org does. To set a non-default host or version see the PersonRiskDetectorServiceTest for an example.