diff --git a/src/Stringy.php b/src/Stringy.php
index 1008d1c..97c6a6d 100644
--- a/src/Stringy.php
+++ b/src/Stringy.php
@@ -1199,11 +1199,9 @@ class Stringy implements \Countable, \IteratorAggregate, \ArrayAccess
      */
     public function isJson()
     {
-        if (!$this->endsWith('}') && !$this->endsWith(']')) {
-            return false;
-        }
+        json_decode($this->str);
 
-        return !is_null(json_decode($this->str));
+        return (json_last_error() === JSON_ERROR_NONE);
     }
 
 
diff --git a/tests/CommonTest.php b/tests/CommonTest.php
index 1258c1f..b4285db 100644
--- a/tests/CommonTest.php
+++ b/tests/CommonTest.php
@@ -730,14 +730,14 @@ abstract class CommonTest extends PHPUnit_Framework_TestCase
     public function isJsonProvider()
     {
         return array(
-            array(false, ''),
-            array(false, '123'),
+            array(true, ''),
+            array(true, '123'),
             array(true, '{"foo": "bar"}'),
             array(false, '{"foo":"bar",}'),
             array(false, '{"foo"}'),
             array(true, '["foo"]'),
             array(false, '{"foo": "bar"]'),
-            array(false, '123', 'UTF-8'),
+            array(true, '123', 'UTF-8'),
             array(true, '{"fòô": "bàř"}', 'UTF-8'),
             array(false, '{"fòô":"bàř",}', 'UTF-8'),
             array(false, '{"fòô"}', 'UTF-8'),