diff --git a/jsonmodels/builders.py b/jsonmodels/builders.py
index c63ec16..d2738b2 100644
--- a/jsonmodels/builders.py
+++ b/jsonmodels/builders.py
@@ -1,6 +1,5 @@
 """Builders to generate in memory representation of model and fields tree."""
 
-
 from collections import defaultdict
 
 from . import errors
diff --git a/jsonmodels/collections.py b/jsonmodels/collections.py
index 5bdf869..9337172 100644
--- a/jsonmodels/collections.py
+++ b/jsonmodels/collections.py
@@ -1,5 +1,4 @@
 class ModelCollection(list):
-
     """`ModelCollection` is list which validates stored values.
 
     Validation is made with use of field passed to `__init__` at each point,
diff --git a/jsonmodels/fields.py b/jsonmodels/fields.py
index 91b0f41..0243f93 100644
--- a/jsonmodels/fields.py
+++ b/jsonmodels/fields.py
@@ -13,7 +13,6 @@
 
 
 class BaseField:
-
     """Base class for all fields."""
 
     types = None
@@ -142,14 +141,12 @@ def structue_name(self, default):
 
 
 class StringField(BaseField):
-
     """String field."""
 
     types = (str,)
 
 
 class IntField(BaseField):
-
     """Integer field."""
 
     types = (int,)
@@ -163,14 +160,12 @@ def parse_value(self, value):
 
 
 class FloatField(BaseField):
-
     """Float field."""
 
     types = (float, int)
 
 
 class BoolField(BaseField):
-
     """Bool field."""
 
     types = (bool,)
@@ -182,14 +177,12 @@ def parse_value(self, value):
 
 
 class DictField(BaseField):
-
     """Dict field."""
 
     types = (dict,)
 
 
 class ListField(BaseField):
-
     """List field."""
 
     types = (list,)
@@ -300,7 +293,6 @@ def to_struct(self, values):
 
 
 class EmbeddedField(BaseField):
-
     """Field for embedded models."""
 
     def __init__(self, model_types, *args, **kwargs):
@@ -403,7 +395,6 @@ def _import(module_name, type_name):
 
 
 class TimeField(StringField):
-
     """Time field."""
 
     types = (datetime.time,)
@@ -434,7 +425,6 @@ def parse_value(self, value):
 
 
 class DateField(StringField):
-
     """Date field."""
 
     types = (datetime.date,)
@@ -466,7 +456,6 @@ def parse_value(self, value):
 
 
 class DateTimeField(StringField):
-
     """Datetime field."""
 
     types = (datetime.datetime,)
diff --git a/jsonmodels/models.py b/jsonmodels/models.py
index 35610c0..2ca1fcc 100644
--- a/jsonmodels/models.py
+++ b/jsonmodels/models.py
@@ -24,7 +24,6 @@ def validate_fields(attributes):
 
 
 class Base(metaclass=JsonmodelMeta):
-
     """Base class for all models."""
 
     def __init__(self, **kwargs):
diff --git a/jsonmodels/parsers.py b/jsonmodels/parsers.py
index 36af245..eecacef 100644
--- a/jsonmodels/parsers.py
+++ b/jsonmodels/parsers.py
@@ -1,4 +1,5 @@
 """Parsers to change model structure into different ones."""
+
 import inspect
 
 from . import builders, errors, fields
diff --git a/jsonmodels/validators.py b/jsonmodels/validators.py
index adadb7f..a2cd43f 100644
--- a/jsonmodels/validators.py
+++ b/jsonmodels/validators.py
@@ -1,4 +1,5 @@
 """Predefined validators."""
+
 import re
 from functools import reduce
 
@@ -7,7 +8,6 @@
 
 
 class Min:
-
     """Validator for minimum value."""
 
     def __init__(self, minimum_value, exclusive=False):
@@ -41,7 +41,6 @@ def modify_schema(self, field_schema):
 
 
 class Max:
-
     """Validator for maximum value."""
 
     def __init__(self, maximum_value, exclusive=False):
@@ -75,7 +74,6 @@ def modify_schema(self, field_schema):
 
 
 class Regex:
-
     """Validator for regular expressions."""
 
     FLAGS = {
@@ -134,7 +132,6 @@ def modify_schema(self, field_schema):
 
 
 class Length:
-
     """Validator for length."""
 
     def __init__(self, minimum_value=None, maximum_value=None):
@@ -186,7 +183,6 @@ def modify_schema(self, field_schema):
 
 
 class Enum:
-
     """Validator for enums."""
 
     def __init__(self, *choices):