diff --git a/lago_python_client/models/fee.py b/lago_python_client/models/fee.py
index 31c5d884..6f6757c8 100644
--- a/lago_python_client/models/fee.py
+++ b/lago_python_client/models/fee.py
@@ -37,7 +37,8 @@ class FeeResponse(BaseResponseModel):
     taxes_amount_cents: Optional[int]
     taxes_rate: Optional[float]
     total_amount_cents: Optional[int]
-    unit_amount_cents: Optional[int]
+    unit_amount_cents: Optional[int] # deprecated
+    precise_unit_amount: Optional[float]
     total_amount_currency: Optional[str]
     units: Optional[float]
     events_count: Optional[int]
diff --git a/tests/fixtures/one_off_invoice.json b/tests/fixtures/one_off_invoice.json
index 578f43d7..cb143a2f 100644
--- a/tests/fixtures/one_off_invoice.json
+++ b/tests/fixtures/one_off_invoice.json
@@ -102,6 +102,7 @@
         "total_amount_cents": 120,
         "total_amount_currency": "EUR",
         "units": 12.6,
+        "precise_unit_amount": 9.52,
         "events_count": 4
       }
     ]
diff --git a/tests/test_invoice_client.py b/tests/test_invoice_client.py
index f541cefc..a1a1f902 100644
--- a/tests/test_invoice_client.py
+++ b/tests/test_invoice_client.py
@@ -53,6 +53,7 @@ def test_valid_create_invoice_request(httpx_mock: HTTPXMock):
     assert response.lago_id == '5eb02857-a71e-4ea2-bcf9-57d3a41bc6ba'
     assert response.invoice_type == 'one_off'
     assert response.fees.__root__[0].invoice_display_name == 'fee_invoice_display_name'
+    assert response.fees.__root__[0].precise_unit_amount == 9.52
     assert response.fees.__root__[0].item.invoice_display_name == 'one_off_invoice_display_name'