diff --git a/src/Transactions/Deserializer.php b/src/Transactions/Deserializer.php
index ae008d5..f0c41f2 100644
--- a/src/Transactions/Deserializer.php
+++ b/src/Transactions/Deserializer.php
@@ -71,7 +71,12 @@ private function deserializeCommon(array &$data): void
         $data['type']            = $this->buffer->readUInt16();
         $data['nonce']           = strval($this->buffer->readUInt64());
         $data['senderPublicKey'] = $this->buffer->readHex(33 * 2);
-        $data['fee']             = $this->buffer->readUInt256();
+        
+        if ($data['type'] === Types::EVM_CALL) {
+            $data['fee']             = $this->buffer->readUInt256();
+        } else {
+            $data['fee']             = strval($this->buffer->readUInt64());
+        }
     }
 
     private function deserializeVendorField(Transaction $transaction): void
diff --git a/src/Transactions/Serializer.php b/src/Transactions/Serializer.php
index abed46f..07c38a4 100644
--- a/src/Transactions/Serializer.php
+++ b/src/Transactions/Serializer.php
@@ -7,6 +7,7 @@
 use ArkEcosystem\Crypto\ByteBuffer\ByteBuffer;
 use ArkEcosystem\Crypto\Configuration\Network;
 use ArkEcosystem\Crypto\Enums\TypeGroup;
+use ArkEcosystem\Crypto\Enums\Types;
 use ArkEcosystem\Crypto\Transactions\Types\Transaction;
 use BitWasp\Buffertools\Buffer;
 
@@ -107,7 +108,11 @@ private function serializeCommon(ByteBuffer $buffer): void
             $buffer->writeHex($this->transaction->data['senderPublicKey']);
         }
 
-        $buffer->writeUint256($this->transaction->data['fee']);
+        if ($this->transaction->data['type'] === Types::EVM_CALL) {
+            $buffer->writeUint256($this->transaction->data['fee']);
+        } else {
+            $buffer->writeUint64($this->transaction->data['fee']);
+        }
     }
 
     private function serializeVendorField(ByteBuffer $buffer): void