diff --git a/gpwebpay/gpwebpay.py b/gpwebpay/gpwebpay.py
index 43151e3..2bb3f03 100644
--- a/gpwebpay/gpwebpay.py
+++ b/gpwebpay/gpwebpay.py
@@ -21,7 +21,7 @@ class GpwebpayClient:
     def __init__(self):
         self.data = None
 
-    def _create_payment_data(self, order_number: str = "", amount: int = 0) -> None:
+    def _create_payment_data(self, order_number: str = "", amount: int = 0, description: str | None = None) -> None:
         """To create the DIGEST we need to keep the order of the params"""
         self.data = OrderedDict()
         self.data["MERCHANTNUMBER"] = settings.merchant_id
@@ -31,6 +31,8 @@ def _create_payment_data(self, order_number: str = "", amount: int = 0) -> None:
         self.data["CURRENCY"] = settings.currency
         self.data["DEPOSITFLAG"] = settings.deposit_flag
         self.data["URL"] = str(settings.merchant_callback_url)
+        if description is not None:
+            self.data["DESCRIPTION"] = description
 
     def _create_message(self, data: dict, is_digest_1: bool = False) -> bytes:
         # Create message according to GPWebPay documentation (4.1.1)
diff --git a/tests/test_gpwebpay.py b/tests/test_gpwebpay.py
index e1842bd..f146f5c 100644
--- a/tests/test_gpwebpay.py
+++ b/tests/test_gpwebpay.py
@@ -11,7 +11,7 @@
 # CVC2: 200
 
 # Example message = "<GPWEBPAY_MERCHANT_ID>|CREATE_ORDER|<order_number>|<amount>|
-# <GPWEBPAY_CURRENCY>|<GPWEBPAY_DEPOSIT_FLAG>|<GPWEBPAY_RESPONSE_URL>"
+# <GPWEBPAY_CURRENCY>|<GPWEBPAY_DEPOSIT_FLAG>|<GPWEBPAY_RESPONSE_URL>|[description]"
 
 
 def test_init(gateway_client):
@@ -38,8 +38,9 @@ def test_create_data(gateway_client, monkeypatch):
         CURRENCY="978",
         DEPOSITFLAG="1",
         URL="https://localhost:5000/payment_callback",
+        DESCRIPTION="Very important payment",
     )
-    gateway_client._create_payment_data(order_number="123456", amount=10)
+    gateway_client._create_payment_data(order_number="123456", amount=10, description="Very important payment")
     assert gateway_client.data == expected_data
 
 
@@ -50,7 +51,7 @@ def test_create_message(gateway_client, monkeypatch):
         b"1234567890|CREATE_ORDER|123456|10|978|1|https://localhost:5000/"
         b"payment_callback"
     )
-    gateway_client._create_payment_data(order_number="123456", amount=10)
+    gateway_client._create_payment_data(order_number="123456", amount=10, description="Very important payment")
     message = gateway_client._create_message(gateway_client.data)
     assert message == expected_message