diff --git a/composer.json b/composer.json
index 6a3f49e..7284afc 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name": "xendit/xendit-php",
     "description": "PHP clients for Xendit API",
-    "version": "2.4.0",
+    "version": "2.4.1",
     "keywords": [
         "xendit"
     ],
diff --git a/src/Xendit.php b/src/Xendit.php
index b3b991c..06894db 100644
--- a/src/Xendit.php
+++ b/src/Xendit.php
@@ -107,22 +107,22 @@ public static function setLibVersion($libVersion = null): void
 
     /**
      * Set custom http client
-     * 
+     *
      * @param HttpCLientInterface $client custom http client
-     * 
+     *
      * @return void
      */
-    public static function setHttpClient(HttpClientInterface $client): void 
-    {   
+    public static function setHttpClient(HttpClientInterface $client): void
+    {
         self::$_httpClient = $client;
     }
 
     /**
      * Get current http client being used in the package
-     * 
+     *
      * @return HttpClientInterface
      */
-    public static function getHttpClient(): HttpClientInterface
+    public static function getHttpClient(): ?HttpClientInterface
     {
         return self::$_httpClient;
     }