diff --git a/graphene_pydantic/converters.py b/graphene_pydantic/converters.py
index 8e93afe..5fb008a 100644
--- a/graphene_pydantic/converters.py
+++ b/graphene_pydantic/converters.py
@@ -123,7 +123,7 @@ def convert_pydantic_field(
             declared_type, field, registry, parent_type=parent_type, model=model
         ),
     )
-    field_kwargs.setdefault("required", field.required)
+    field_kwargs.setdefault("required", not field.allow_none)
     field_kwargs.setdefault("default_value", field.default)
     # TODO: find a better way to get a field's description. Some ideas include:
     # - hunt down the description from the field's schema, or the schema
diff --git a/tests/test_converters.py b/tests/test_converters.py
index 1b0f1d9..1354524 100644
--- a/tests/test_converters.py
+++ b/tests/test_converters.py
@@ -43,9 +43,9 @@ def test_default_values():
     field = _convert_field_from_spec("s", "hi")
     assert field is not None
     assert isinstance(field, graphene.Field)
-    # there's a default value, so it's not required
-    assert not isinstance(field.type, graphene.NonNull)
-    assert field.type == graphene.String
+    # there's a default value, so it never null
+    assert isinstance(field.type, graphene.NonNull)
+    assert field.type.of_type == graphene.String
     assert field.default_value == "hi"
 
 
@@ -65,15 +65,15 @@ def test_default_values():
 def test_builtin_scalars(input, expected):
     field = _convert_field_from_spec("attr", input)
     assert isinstance(field, graphene.Field)
-    assert field.type == expected
+    assert field.type.of_type == expected
     assert field.default_value == input[1]
 
 
 def test_union():
     field = _convert_field_from_spec("attr", (T.Union[int, float, str], 5.0))
-    assert issubclass(field.type, graphene.Union)
+    assert issubclass(field.type.of_type, graphene.Union)
     assert field.default_value == 5.0
-    assert field.type.__name__.startswith("UnionOf")
+    assert field.type.of_type.__name__.startswith("UnionOf")
 
 
 if sys.version_info >= (3, 8):
@@ -83,15 +83,15 @@ def test_literal():
         field = _convert_field_from_spec(
             "attr", (T.Literal["literal1", "literal2", 3], 3)
         )
-        assert issubclass(field.type, graphene.Union)
+        assert issubclass(field.type.of_type, graphene.Union)
         assert field.default_value == 3
-        assert field.type.__name__.startswith("UnionOf")
+        assert field.type.of_type.__name__.startswith("UnionOf")
 
     def test_literal_singleton():
         field = _convert_field_from_spec("attr", (T.Literal["literal1"], "literal1"))
-        assert issubclass(field.type, graphene.String)
+        assert issubclass(field.type.of_type, graphene.String)
         assert field.default_value == "literal1"
-        assert field.type == graphene.String
+        assert field.type.of_type == graphene.String
 
 
 def test_mapping():
@@ -103,34 +103,34 @@ def test_mapping():
 def test_decimal(monkeypatch):
     monkeypatch.setattr(converters, "DECIMAL_SUPPORTED", True)
     field = _convert_field_from_spec("attr", (decimal.Decimal, decimal.Decimal(1.25)))
-    assert field.type.__name__ == "Decimal"
+    assert field.type.of_type.__name__ == "Decimal"
 
     monkeypatch.setattr(converters, "DECIMAL_SUPPORTED", False)
     field = _convert_field_from_spec("attr", (decimal.Decimal, decimal.Decimal(1.25)))
-    assert field.type.__name__ == "Float"
+    assert field.type.of_type.__name__ == "Float"
 
 
 def test_iterables():
     field = _convert_field_from_spec("attr", (T.List[int], [1, 2]))
-    assert isinstance(field.type, graphene.types.List)
+    assert isinstance(field.type.of_type, graphene.types.List)
 
     field = _convert_field_from_spec("attr", (list, [1, 2]))
-    assert field.type == graphene.types.List
+    assert field.type.of_type == graphene.types.List
 
     field = _convert_field_from_spec("attr", (T.Set[int], {1, 2}))
-    assert isinstance(field.type, graphene.types.List)
+    assert isinstance(field.type.of_type, graphene.types.List)
 
     field = _convert_field_from_spec("attr", (set, {1, 2}))
-    assert field.type == graphene.types.List
+    assert field.type.of_type == graphene.types.List
 
     field = _convert_field_from_spec("attr", (T.Tuple[int, float], (1, 2.2)))
-    assert isinstance(field.type, graphene.types.List)
+    assert isinstance(field.type.of_type, graphene.types.List)
 
     field = _convert_field_from_spec("attr", (T.Tuple[int, ...], (1, 2.2)))
-    assert isinstance(field.type, graphene.types.List)
+    assert isinstance(field.type.of_type, graphene.types.List)
 
     field = _convert_field_from_spec("attr", (tuple, (1, 2)))
-    assert field.type == graphene.types.List
+    assert field.type.of_type == graphene.types.List
 
     field = _convert_field_from_spec("attr", (T.Union[None, int], 1))
     assert field.type == graphene.types.Int
@@ -142,8 +142,8 @@ class Color(enum.Enum):
         GREEN = 2
 
     field = _convert_field_from_spec("attr", (Color, Color.RED))
-    assert field.type.__name__ == "Color"
-    assert field.type._meta.enum == Color
+    assert field.type.of_type.__name__ == "Color"
+    assert field.type.of_type._meta.enum == Color
 
 
 def test_existing_model():
@@ -157,7 +157,7 @@ class Meta:
             model = Foo
 
     field = _convert_field_from_spec("attr", (Foo, Foo(name="bar")))
-    assert field.type == GraphFoo
+    assert field.type.of_type == GraphFoo
 
 
 def test_unresolved_placeholders():