diff --git a/lago_python_client/models/payment.py b/lago_python_client/models/payment.py
index 0335055..869b209 100644
--- a/lago_python_client/models/payment.py
+++ b/lago_python_client/models/payment.py
@@ -13,6 +13,7 @@ class Payment(BaseModel):
 class PaymentResponse(BaseResponseModel):
     lago_id: str
     invoice_ids: List[str]
+    invoice_numbers: List[str]
     amount_cents: int
     amount_currency: str
     payment_status: str
diff --git a/tests/fixtures/payment.json b/tests/fixtures/payment.json
index 9b006c5..9ab94a4 100644
--- a/tests/fixtures/payment.json
+++ b/tests/fixtures/payment.json
@@ -2,6 +2,7 @@
   "payment": {
     "lago_id": "8e5d5ec2-bdc7-4c43-a944-5ababae775d4",
     "invoice_ids": ["f8e194df-5d90-4382-b146-c881d2c67f28"],
+    "invoice_numbers": ["LAG-1234-567-890"],
     "amount_cents": 100,
     "amount_currency": "USD",
     "payment_status": "succeeded",
diff --git a/tests/fixtures/payment_index.json b/tests/fixtures/payment_index.json
index e13679a..71ba597 100644
--- a/tests/fixtures/payment_index.json
+++ b/tests/fixtures/payment_index.json
@@ -5,6 +5,9 @@
       "invoice_ids": [
         "ed267c66-8170-4d23-83e8-6d6e4fc735ef"
       ],
+      "invoice_numbers": [
+        "LAG-1234-567-891"
+      ],
       "amount_cents": 100,
       "amount_currency": "USD",
       "payment_status": "succeeded",
diff --git a/tests/fixtures/payment_receipt.json b/tests/fixtures/payment_receipt.json
index dcd9ac9..d56abf1 100644
--- a/tests/fixtures/payment_receipt.json
+++ b/tests/fixtures/payment_receipt.json
@@ -8,6 +8,9 @@
       "invoice_ids": [
           "ed267c66-8170-4d23-83e8-6d6e4fc735ef"
       ],
+      "invoice_numbers": [
+          "LAG-1234-567-891"
+      ],
       "amount_cents": 100,
       "amount_currency": "USD",
       "payment_status": "succeeded",
diff --git a/tests/fixtures/payment_receipt_index.json b/tests/fixtures/payment_receipt_index.json
index ef1b93c..83b8246 100644
--- a/tests/fixtures/payment_receipt_index.json
+++ b/tests/fixtures/payment_receipt_index.json
@@ -9,6 +9,9 @@
         "invoice_ids": [
             "ed267c66-8170-4d23-83e8-6d6e4fc735ef"
         ],
+        "invoice_numbers": [
+            "LAG-1234-567-891"
+        ],
         "amount_cents": 100,
         "amount_currency": "USD",
         "payment_status": "succeeded",
diff --git a/tests/test_payment_client.py b/tests/test_payment_client.py
index 5b2e287..6daf6f7 100644
--- a/tests/test_payment_client.py
+++ b/tests/test_payment_client.py
@@ -92,6 +92,8 @@ def test_valid_create_payment_request(httpx_mock: HTTPXMock):
     assert response.payment_status == "succeeded"
     assert len(response.invoice_ids) == 1
     assert response.invoice_ids[0] == "f8e194df-5d90-4382-b146-c881d2c67f28"
+    assert len(response.invoice_numbers) == 1
+    assert response.invoice_numbers[0] == "LAG-1234-567-890"
 
 
 def test_invalid_create_payment_request(httpx_mock: HTTPXMock):