diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index a6dd943..c57598f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -12,3 +12,17 @@ repos:
     rev: v0.910
     hooks:
       - id: mypy
+        args: [--no-strict-optional, --ignore-missing-imports]
+        additional_dependencies: [
+            types-ujson>=0.1.1,
+            types-PyMySQL>=1.0.2,
+            types-ipaddress>=1.0.0,
+            types-enum34>=1.1.0,
+            types-cryptography>=3.3.5,
+            types-orjson>=3.6.0,
+            types-aiofiles>=0.1.9,
+            types-pkg-resources>=0.1.3,
+            types-requests>=2.25.9,
+            types-toml>=0.10.0,
+            pydantic>=1.8.2
+        ]
diff --git a/ormar/fields/model_fields.py b/ormar/fields/model_fields.py
index a404204..a819b61 100644
--- a/ormar/fields/model_fields.py
+++ b/ormar/fields/model_fields.py
@@ -63,7 +63,11 @@ def is_auto_primary_key(primary_key: bool, autoincrement: bool) -> bool:
 
 
 def convert_choices_if_needed(
-    field_type: "Type", choices: Set, nullable: bool, scale: int = None
+    field_type: "Type",
+    choices: Set,
+    nullable: bool,
+    scale: int = None,
+    represent_as_str: bool = False,
 ) -> Set:
     """
     Converts dates to isoformat as fastapi can check this condition in routes
@@ -74,10 +78,14 @@ def convert_choices_if_needed(
 
     :param field_type: type o the field
     :type field_type: Type
-    :param nullable: set of choices
-    :type nullable: Set
+    :param choices: set of choices
+    :type choices: Set
     :param scale: scale for decimals
     :type scale: int
+    :param nullable: flag if field_nullable
+    :type nullable: bool
+    :param represent_as_str: flag for bytes fields
+    :type represent_as_str: bool
     :param scale: scale for decimals
     :type scale: int
     :return: value, choices list
@@ -88,6 +96,8 @@ def convert_choices_if_needed(
     if field_type == decimal.Decimal:
         precision = scale
         choices = {encoder(o, precision) for o in choices}
+    elif field_type == bytes:
+        choices = {encoder(o, represent_as_str) for o in choices}
     elif encoder:
         choices = {encoder(o) for o in choices}
     if nullable:
@@ -138,6 +148,7 @@ class ModelFieldFactory:
                 choices=choices,
                 nullable=nullable,
                 scale=kwargs.get("scale", None),
+                represent_as_str=kwargs.get("represent_as_base64_str", False),
             )
 
         namespace = dict(
diff --git a/ormar/models/helpers/validation.py b/ormar/models/helpers/validation.py
index 0ed1635..b3e8e15 100644
--- a/ormar/models/helpers/validation.py
+++ b/ormar/models/helpers/validation.py
@@ -63,6 +63,9 @@ def convert_value_if_needed(field: "BaseField", value: Any) -> Any:
     if field.__type__ == decimal.Decimal:
         precision = field.scale  # type: ignore
         value = encoder(value, precision)
+    elif field.__type__ == bytes:
+        represent_as_string = field.represent_as_base64_str
+        value = encoder(value, represent_as_string)
     elif encoder:
         value = encoder(value)
     return value
diff --git a/tests/test_fastapi/test_choices_schema.py b/tests/test_fastapi/test_choices_schema.py
index da8a167..800c90e 100644
--- a/tests/test_fastapi/test_choices_schema.py
+++ b/tests/test_fastapi/test_choices_schema.py
@@ -121,8 +121,6 @@ def test_all_endpoints():
                 "blob_col": blob.decode("utf-8"),
             },
         )
-        if response.status_code != 200:
-            print(response.text)
         assert response.status_code == 200
         item = Organisation(**response.json())
         assert item.pk is not None
diff --git a/tests/test_inheritance_and_pydantic_generation/test_pydantic_fields_order.py b/tests/test_inheritance_and_pydantic_generation/test_pydantic_fields_order.py
index 96d5f98..ffc515e 100644
--- a/tests/test_inheritance_and_pydantic_generation/test_pydantic_fields_order.py
+++ b/tests/test_inheritance_and_pydantic_generation/test_pydantic_fields_order.py
@@ -14,7 +14,7 @@ class BaseMeta(ormar.ModelMeta):
     metadata = metadata
 
 
-class TestModel(ormar.Model):
+class NewTestModel(ormar.Model):
     class Meta:
         database = database
         metadata = metadata
@@ -37,5 +37,5 @@ def create_test_database():
 
 
 def test_model_field_order():
-    TestCreate = TestModel.get_pydantic(exclude={"a"})
+    TestCreate = NewTestModel.get_pydantic(exclude={"a"})
     assert list(TestCreate.__fields__.keys()) == ["b", "c", "d", "e", "f"]