diff --git a/src/immoney/_pydantic.py b/src/immoney/_pydantic.py
index 8aabce1..90312ba 100644
--- a/src/immoney/_pydantic.py
+++ b/src/immoney/_pydantic.py
@@ -254,7 +254,7 @@ def schema(currency_schema: core_schema.CoreSchema) -> core_schema.CoreSchema:
             wrapped=core_schema.typed_dict_schema(
                 {
                     "overdraft_subunits": core_schema.typed_dict_field(
-                        core_schema.int_schema(gt=0),
+                        core_schema.int_schema(ge=0),
                         required=True,
                     ),
                     "currency": core_schema.typed_dict_field(
diff --git a/tests/test_pydantic.py b/tests/test_pydantic.py
index b0e89ae..f54bca4 100644
--- a/tests/test_pydantic.py
+++ b/tests/test_pydantic.py
@@ -681,14 +681,14 @@ def test_can_roundtrip_valid_data(
         assert instance.overdraft == expected
         assert json.loads(instance.model_dump_json()) == data
 
-    @pytest.mark.parametrize("value", (0, -1, -1024))
-    def test_parsing_raises_validation_error_for_non_positive_value(
+    @pytest.mark.parametrize("value", (-1, -1024))
+    def test_parsing_raises_validation_error_for_negative_value(
         self,
         value: int,
     ) -> None:
         with pytest.raises(
             ValidationError,
-            match=r"Input should be greater than 0",
+            match=r"Input should be greater than or equal to 0",
         ):
             DefaultOverdraftModel.model_validate(
                 {
@@ -736,7 +736,7 @@ def test_can_generate_schema(self) -> None:
                         "overdraft_subunits": {
                             "title": "Overdraft Subunits",
                             "type": "integer",
-                            "exclusiveMinimum": 0,
+                            "minimum": 0,
                         },
                     },
                     "required": sorted_items_equal(["overdraft_subunits", "currency"]),
@@ -806,7 +806,7 @@ def test_can_generate_schema(self) -> None:
                         "overdraft_subunits": {
                             "title": "Overdraft Subunits",
                             "type": "integer",
-                            "exclusiveMinimum": 0,
+                            "minimum": 0,
                         },
                     },
                     "required": sorted_items_equal(["overdraft_subunits", "currency"]),
@@ -872,7 +872,7 @@ def test_can_generate_schema(self) -> None:
                         "overdraft_subunits": {
                             "title": "Overdraft Subunits",
                             "type": "integer",
-                            "exclusiveMinimum": 0,
+                            "minimum": 0,
                         },
                     },
                     "required": sorted_items_equal(["overdraft_subunits", "currency"]),