diff --git a/src/Utils/HttpClient.php b/src/Utils/HttpClient.php
index d87e75d0..a454f6dc 100644
--- a/src/Utils/HttpClient.php
+++ b/src/Utils/HttpClient.php
@@ -33,7 +33,7 @@ public function request($method, $url, $payload = [], $options = null)
 
         $baseHeaders = [
             'Content-Type' => 'application/json',
-            'User-Agent'   => 'SDK-PHP/' . $installedVersion,
+            'User-Agent'   => 'SDK-PHP/'.$installedVersion,
         ];
 
         $givenHeaders = isset($options['headers']) ? $options['headers'] : [];