diff --git a/src/Methods/Eth/GetBlockByNumber.php b/src/Methods/Eth/GetBlockByNumber.php
index fecb5aa..5a19167 100644
--- a/src/Methods/Eth/GetBlockByNumber.php
+++ b/src/Methods/Eth/GetBlockByNumber.php
@@ -14,6 +14,7 @@ namespace Web3\Methods\Eth;
 use InvalidArgumentException;
 use Web3\Methods\EthMethod;
 use Web3\Validators\QuantityValidator;
+use Web3\Validators\TagValidator;
 use Web3\Validators\BooleanValidator;
 use Web3\Formatters\OptionalQuantityFormatter;
 use Web3\Formatters\BooleanFormatter;
@@ -26,7 +27,9 @@ class GetBlockByNumber extends EthMethod
      * @var array
      */
     protected $validators = [
-        QuantityValidator::class, BooleanValidator::class
+        [
+            QuantityValidator::class, TagValidator::class
+        ], BooleanValidator::class
     ];
 
     /**
@@ -50,7 +53,9 @@ class GetBlockByNumber extends EthMethod
      * 
      * @var array
      */
-    protected $defaultValues = [];
+    protected $defaultValues = [
+        0 => 'latest'
+    ];
 
     /**
      * construct