diff --git a/src/Methods/Eth/GetBalance.php b/src/Methods/Eth/GetBalance.php
index 793dad4..007e97b 100644
--- a/src/Methods/Eth/GetBalance.php
+++ b/src/Methods/Eth/GetBalance.php
@@ -18,6 +18,7 @@ use Web3\Validators\QuantityValidator;
 use Web3\Validators\AddressValidator;
 use Web3\Formatters\AddressFormatter;
 use Web3\Formatters\OptionalQuantityFormatter;
+use Web3\Formatters\BigNumberFormatter;
 
 class GetBalance extends EthMethod
 {
@@ -46,7 +47,9 @@ class GetBalance extends EthMethod
      * 
      * @var array
      */
-    protected $outputFormatters = [];
+    protected $outputFormatters = [
+        BigNumberFormatter::class
+    ];
 
     /**
      * defaultValues
diff --git a/test/unit/EthApiTest.php b/test/unit/EthApiTest.php
index 7f30819..a017c3b 100644
--- a/test/unit/EthApiTest.php
+++ b/test/unit/EthApiTest.php
@@ -177,7 +177,7 @@ class EthApiTest extends TestCase
             if ($err !== null) {
                 return $this->fail($err->getMessage());
             }
-            $this->assertTrue(is_string($balance));
+            $this->assertTrue(is_numeric($balance->toString()));
         });
     }