diff --git a/src/Eth.php b/src/Eth.php
index 386a36a..a76ed73 100644
--- a/src/Eth.php
+++ b/src/Eth.php
@@ -59,6 +59,18 @@ class Eth
                 ],
             ]
         ],
+        'eth_getTransactionCount' => [
+            'params'=> [
+                [
+                    'validators' => AddressValidator::class,
+                ], [
+                    'default' => 'latest',
+                    'validators' => [
+                        TagValidator::class, QuantityValidator::class,
+                    ]
+                ],
+            ]
+        ],
     ];
 
     /**
diff --git a/test/unit/EthTest.php b/test/unit/EthTest.php
index da45d8a..6d0c568 100644
--- a/test/unit/EthTest.php
+++ b/test/unit/EthTest.php
@@ -241,6 +241,27 @@ class EthTest extends TestCase
         });
     }
 
+    /**
+     * testTransactionCount
+     * 
+     * @return void
+     */    
+    public function testTransactionCount()
+    {
+        $eth = $this->web3->eth;
+
+        $eth->getTransactionCount('0x407d73d8a49eeb85d32cf465507dd71d507100c1', function ($err, $transactionCount) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            if (isset($transactionCount->result)) {
+                $this->assertTrue(is_string($transactionCount->result));
+            } else {
+                $this->fail($transactionCount->error->message);
+            }
+        });
+    }
+
     /**
      * testUnallowedMethod
      *