diff --git a/src/Denpa/Bitcoin/Client.php b/src/Denpa/Bitcoin/Client.php
index fad1123..fae9ee1 100644
--- a/src/Denpa/Bitcoin/Client.php
+++ b/src/Denpa/Bitcoin/Client.php
@@ -72,7 +72,7 @@ public function __construct(Array $params = [])
 				$params['password']
 			],
 			'verify'   => (isset($params['ca']) && is_file($params['ca']) ? $params['ca'] : true),
-			'handler'  => (isset($params['handler']) ? $params['handler'] : ''),
+			'handler'  => (isset($params['handler']) ? $params['handler'] : null),
 		]);
 	}
 
diff --git a/tests/Denpa/Bitcoin/ClientTest.php b/tests/Denpa/Bitcoin/ClientTest.php
index 6b1a9fe..3295956 100644
--- a/tests/Denpa/Bitcoin/ClientTest.php
+++ b/tests/Denpa/Bitcoin/ClientTest.php
@@ -142,4 +142,6 @@ public function testClientExceptionWithServerErrorCode(Client $bitcoind) {
 
 		return $bitcoind;
 	}
-}
\ No newline at end of file
+}
+
+?>
\ No newline at end of file