diff --git a/docs/conf.py b/docs/conf.py
index 26becbc2..0166d4c2 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -64,18 +64,18 @@ source_suffix = ".rst"
 master_doc = "index"
 
 # General information about the project.
-project = u"Graphene"
-copyright = u"Graphene 2016"
-author = u"Syrus Akbary"
+project = "Graphene"
+copyright = "Graphene 2016"
+author = "Syrus Akbary"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = u"1.0"
+version = "1.0"
 # The full version, including alpha/beta/rc tags.
-release = u"1.0"
+release = "1.0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -278,7 +278,7 @@ latex_elements = {
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, "Graphene.tex", u"Graphene Documentation", u"Syrus Akbary", "manual")
+    (master_doc, "Graphene.tex", "Graphene Documentation", "Syrus Akbary", "manual")
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -318,7 +318,7 @@ latex_documents = [
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [(master_doc, "graphene", u"Graphene Documentation", [author], 1)]
+man_pages = [(master_doc, "graphene", "Graphene Documentation", [author], 1)]
 
 # If true, show URL addresses after external links.
 #
@@ -334,7 +334,7 @@ texinfo_documents = [
     (
         master_doc,
         "Graphene",
-        u"Graphene Documentation",
+        "Graphene Documentation",
         author,
         "Graphene",
         "One line description of project.",
diff --git a/examples/starwars/data.py b/examples/starwars/data.py
index 6c68b85c..c374b713 100644
--- a/examples/starwars/data.py
+++ b/examples/starwars/data.py
@@ -3,7 +3,7 @@ droid_data = {}
 
 
 def setup():
-    from .schema import Human, Droid
+    from .schema import Droid, Human
 
     global human_data, droid_data
     luke = Human(
diff --git a/examples/starwars_relay/data.py b/examples/starwars_relay/data.py
index 0ed654c2..ab3dc475 100644
--- a/examples/starwars_relay/data.py
+++ b/examples/starwars_relay/data.py
@@ -4,7 +4,7 @@ data = {}
 def setup():
     global data
 
-    from .schema import Ship, Faction
+    from .schema import Faction, Ship
 
     xwing = Ship(id="1", name="X-Wing")
 
diff --git a/examples/starwars_relay/tests/snapshots/snap_test_objectidentification.py b/examples/starwars_relay/tests/snapshots/snap_test_objectidentification.py
index 7bce5ba3..7462e104 100644
--- a/examples/starwars_relay/tests/snapshots/snap_test_objectidentification.py
+++ b/examples/starwars_relay/tests/snapshots/snap_test_objectidentification.py
@@ -4,7 +4,6 @@ from __future__ import unicode_literals
 
 from snapshottest import Snapshot
 
-
 snapshots = Snapshot()
 
 snapshots["test_correctly_fetches_id_name_rebels 1"] = {
diff --git a/graphene/relay/__init__.py b/graphene/relay/__init__.py
index 7238fa72..313a6f24 100644
--- a/graphene/relay/__init__.py
+++ b/graphene/relay/__init__.py
@@ -1,6 +1,6 @@
-from .node import Node, is_node, GlobalID
-from .mutation import ClientIDMutation
 from .connection import Connection, ConnectionField, PageInfo
+from .mutation import ClientIDMutation
+from .node import GlobalID, Node, is_node
 
 __all__ = [
     "Node",
diff --git a/graphene/relay/node.py b/graphene/relay/node.py
index b189bc97..8defefff 100644
--- a/graphene/relay/node.py
+++ b/graphene/relay/node.py
@@ -92,11 +92,9 @@ class Node(AbstractNode):
             _type, _id = cls.from_global_id(global_id)
         except Exception as e:
             raise Exception(
-                (
-                    f'Unable to parse global ID "{global_id}". '
-                    'Make sure it is a base64 encoded string in the format: "TypeName:id". '
-                    f"Exception message: {str(e)}"
-                )
+                f'Unable to parse global ID "{global_id}". '
+                'Make sure it is a base64 encoded string in the format: "TypeName:id". '
+                f"Exception message: {str(e)}"
             )
 
         graphene_type = info.schema.get_type(_type)
diff --git a/graphene/relay/tests/test_connection_async.py b/graphene/relay/tests/test_connection_async.py
index b139f6a3..dade1f3c 100644
--- a/graphene/relay/tests/test_connection_async.py
+++ b/graphene/relay/tests/test_connection_async.py
@@ -1,10 +1,9 @@
+from graphql_relay.utils import base64
 from pytest import mark
 
-from graphql_relay.utils import base64
-
-from graphene.types import ObjectType, Schema, String
 from graphene.relay.connection import Connection, ConnectionField, PageInfo
 from graphene.relay.node import Node
+from graphene.types import ObjectType, Schema, String
 
 letter_chars = ["A", "B", "C", "D", "E"]
 
diff --git a/graphene/relay/tests/test_connection_query.py b/graphene/relay/tests/test_connection_query.py
index cac4b65b..bc2298a7 100644
--- a/graphene/relay/tests/test_connection_query.py
+++ b/graphene/relay/tests/test_connection_query.py
@@ -1,6 +1,5 @@
-from pytest import mark
-
 from graphql_relay.utils import base64
+from pytest import mark
 
 from ...types import ObjectType, Schema, String
 from ..connection import Connection, ConnectionField, PageInfo
@@ -164,14 +163,16 @@ async def test_respects_first_and_after_and_before_too_few():
 @mark.asyncio
 async def test_respects_first_and_after_and_before_too_many():
     await check(
-        f'first: 4, after: "{cursor_for("A")}", before: "{cursor_for("E")}"', "BCD",
+        f'first: 4, after: "{cursor_for("A")}", before: "{cursor_for("E")}"',
+        "BCD",
     )
 
 
 @mark.asyncio
 async def test_respects_first_and_after_and_before_exactly_right():
     await check(
-        f'first: 3, after: "{cursor_for("A")}", before: "{cursor_for("E")}"', "BCD",
+        f'first: 3, after: "{cursor_for("A")}", before: "{cursor_for("E")}"',
+        "BCD",
     )
 
 
@@ -187,14 +188,16 @@ async def test_respects_last_and_after_and_before_too_few():
 @mark.asyncio
 async def test_respects_last_and_after_and_before_too_many():
     await check(
-        f'last: 4, after: "{cursor_for("A")}", before: "{cursor_for("E")}"', "BCD",
+        f'last: 4, after: "{cursor_for("A")}", before: "{cursor_for("E")}"',
+        "BCD",
     )
 
 
 @mark.asyncio
 async def test_respects_last_and_after_and_before_exactly_right():
     await check(
-        f'last: 3, after: "{cursor_for("A")}", before: "{cursor_for("E")}"', "BCD",
+        f'last: 3, after: "{cursor_for("A")}", before: "{cursor_for("E")}"',
+        "BCD",
     )
 
 
diff --git a/graphene/relay/tests/test_mutation_async.py b/graphene/relay/tests/test_mutation_async.py
index 4308a614..99646623 100644
--- a/graphene/relay/tests/test_mutation_async.py
+++ b/graphene/relay/tests/test_mutation_async.py
@@ -1,8 +1,8 @@
 from pytest import mark
 
+from graphene.relay.mutation import ClientIDMutation
 from graphene.types import ID, Field, ObjectType, Schema
 from graphene.types.scalars import String
-from graphene.relay.mutation import ClientIDMutation
 
 
 class SharedFields(object):
diff --git a/graphene/relay/tests/test_node.py b/graphene/relay/tests/test_node.py
index d46838ac..b3a6bbee 100644
--- a/graphene/relay/tests/test_node.py
+++ b/graphene/relay/tests/test_node.py
@@ -1,4 +1,5 @@
 import re
+
 from graphql_relay import to_global_id
 
 from graphene.tests.utils import dedent
diff --git a/graphene/test/__init__.py b/graphene/test/__init__.py
index 8591dc06..8da09550 100644
--- a/graphene/test/__init__.py
+++ b/graphene/test/__init__.py
@@ -1,6 +1,6 @@
-from promise import Promise, is_thenable
-from graphql.error import format_error as format_graphql_error
 from graphql.error import GraphQLError
+from graphql.error import format_error as format_graphql_error
+from promise import Promise, is_thenable
 
 from graphene.types.schema import Schema
 
diff --git a/graphene/types/argument.py b/graphene/types/argument.py
index 71026d45..31a23db7 100644
--- a/graphene/types/argument.py
+++ b/graphene/types/argument.py
@@ -71,9 +71,9 @@ class Argument(MountedType):
 
 
 def to_arguments(args, extra_args=None):
-    from .unmountedtype import UnmountedType
     from .field import Field
     from .inputfield import InputField
+    from .unmountedtype import UnmountedType
 
     if extra_args:
         extra_args = sorted(extra_args.items(), key=lambda f: f[1])
diff --git a/graphene/types/base64.py b/graphene/types/base64.py
index baedabeb..1ec87743 100644
--- a/graphene/types/base64.py
+++ b/graphene/types/base64.py
@@ -1,5 +1,5 @@
-from binascii import Error as _Error
 from base64 import b64decode, b64encode
+from binascii import Error as _Error
 
 from graphql.error import GraphQLError
 from graphql.language import StringValueNode, print_ast
diff --git a/graphene/types/decimal.py b/graphene/types/decimal.py
index b2acbe7e..dfe8e14a 100644
--- a/graphene/types/decimal.py
+++ b/graphene/types/decimal.py
@@ -2,7 +2,7 @@ from __future__ import absolute_import
 
 from decimal import Decimal as _Decimal
 
-from graphql.language.ast import StringValueNode, IntValueNode
+from graphql.language.ast import IntValueNode, StringValueNode
 
 from .scalars import Scalar
 
diff --git a/graphene/types/field.py b/graphene/types/field.py
index dafb04b5..91d511bf 100644
--- a/graphene/types/field.py
+++ b/graphene/types/field.py
@@ -2,13 +2,13 @@ import inspect
 from collections.abc import Mapping
 from functools import partial
 
+from ..utils.deprecated import warn_deprecation
 from .argument import Argument, to_arguments
 from .mountedtype import MountedType
 from .resolver import default_resolver
 from .structures import NonNull
 from .unmountedtype import UnmountedType
 from .utils import get_type
-from ..utils.deprecated import warn_deprecation
 
 base_type = type
 
diff --git a/graphene/types/inputfield.py b/graphene/types/inputfield.py
index 791ca6a4..a9af4b96 100644
--- a/graphene/types/inputfield.py
+++ b/graphene/types/inputfield.py
@@ -55,7 +55,7 @@ class InputField(MountedType):
         description=None,
         required=False,
         _creation_counter=None,
-        **extra_args
+        **extra_args,
     ):
         super(InputField, self).__init__(_creation_counter=_creation_counter)
         self.name = name
diff --git a/graphene/types/inputobjecttype.py b/graphene/types/inputobjecttype.py
index 98f0148d..6eda6a7e 100644
--- a/graphene/types/inputobjecttype.py
+++ b/graphene/types/inputobjecttype.py
@@ -6,7 +6,7 @@ from .utils import yank_fields_from_attrs
 # For static type checking with Mypy
 MYPY = False
 if MYPY:
-    from typing import Dict, Callable  # NOQA
+    from typing import Callable, Dict  # NOQA
 
 
 class InputObjectTypeOptions(BaseOptions):
diff --git a/graphene/types/mutation.py b/graphene/types/mutation.py
index 6e041bbf..be82f133 100644
--- a/graphene/types/mutation.py
+++ b/graphene/types/mutation.py
@@ -2,15 +2,16 @@ from ..utils.deprecated import warn_deprecation
 from ..utils.get_unbound_function import get_unbound_function
 from ..utils.props import props
 from .field import Field
+from .interface import Interface
 from .objecttype import ObjectType, ObjectTypeOptions
 from .utils import yank_fields_from_attrs
-from .interface import Interface
 
 # For static type checking with Mypy
 MYPY = False
 if MYPY:
+    from typing import Callable, Dict, Iterable, Type  # NOQA
+
     from .argument import Argument  # NOQA
-    from typing import Dict, Type, Callable, Iterable  # NOQA
 
 
 class MutationOptions(ObjectTypeOptions):
@@ -99,12 +100,10 @@ class Mutation(ObjectType):
                 input_class = getattr(cls, "Input", None)
                 if input_class:
                     warn_deprecation(
-                        (
-                            f"Please use {cls.__name__}.Arguments instead of {cls.__name__}.Input."
-                            " Input is now only used in ClientMutationID.\n"
-                            "Read more:"
-                            " https://github.com/graphql-python/graphene/blob/v2.0.0/UPGRADE-v2.0.md#mutation-input"
-                        )
+                        f"Please use {cls.__name__}.Arguments instead of {cls.__name__}.Input."
+                        " Input is now only used in ClientMutationID.\n"
+                        "Read more:"
+                        " https://github.com/graphql-python/graphene/blob/v2.0.0/UPGRADE-v2.0.md#mutation-input"
                     )
 
             if input_class:
diff --git a/graphene/types/scalars.py b/graphene/types/scalars.py
index 472f2d41..867b2242 100644
--- a/graphene/types/scalars.py
+++ b/graphene/types/scalars.py
@@ -143,7 +143,7 @@ class String(Scalar):
     @staticmethod
     def coerce_string(value):
         if isinstance(value, bool):
-            return u"true" if value else u"false"
+            return "true" if value else "false"
         return str(value)
 
     serialize = coerce_string
diff --git a/graphene/types/schema.py b/graphene/types/schema.py
index 4fd71769..f0a4d2c5 100644
--- a/graphene/types/schema.py
+++ b/graphene/types/schema.py
@@ -2,20 +2,11 @@ import inspect
 from functools import partial
 
 from graphql import (
-    default_type_resolver,
-    get_introspection_query,
-    graphql,
-    graphql_sync,
-    introspection_types,
-    parse,
-    print_schema,
-    subscribe,
-    validate,
     ExecutionResult,
     GraphQLArgument,
     GraphQLBoolean,
-    GraphQLError,
     GraphQLEnumValue,
+    GraphQLError,
     GraphQLField,
     GraphQLFloat,
     GraphQLID,
@@ -27,12 +18,21 @@ from graphql import (
     GraphQLSchema,
     GraphQLString,
     Undefined,
+    default_type_resolver,
+    get_introspection_query,
+    graphql,
+    graphql_sync,
+    introspection_types,
+    parse,
+    print_schema,
+    subscribe,
+    validate,
 )
 from graphql.execution import ExecutionContext
 from graphql.execution.values import get_argument_values
 
-from ..utils.str_converters import to_camel_case
 from ..utils.get_unbound_function import get_unbound_function
+from ..utils.str_converters import to_camel_case
 from .definitions import (
     GrapheneEnumType,
     GrapheneGraphQLType,
diff --git a/graphene/types/tests/test_base64.py b/graphene/types/tests/test_base64.py
index b096dcbc..6c5331a6 100644
--- a/graphene/types/tests/test_base64.py
+++ b/graphene/types/tests/test_base64.py
@@ -2,10 +2,10 @@ import base64
 
 from graphql import GraphQLError
 
+from ..base64 import Base64
 from ..objecttype import ObjectType
 from ..scalars import String
 from ..schema import Schema
-from ..base64 import Base64
 
 
 class Query(ObjectType):
@@ -72,7 +72,8 @@ def test_base64_query_invalid():
 
     for input_ in bad_inputs:
         result = schema.execute(
-            """{ base64(input: $input) }""", variables={"input": input_},
+            """{ base64(input: $input) }""",
+            variables={"input": input_},
         )
         assert isinstance(result.errors, list)
         assert len(result.errors) == 1
diff --git a/graphene/types/tests/test_datetime.py b/graphene/types/tests/test_datetime.py
index 74f88bd8..3eddefff 100644
--- a/graphene/types/tests/test_datetime.py
+++ b/graphene/types/tests/test_datetime.py
@@ -2,7 +2,6 @@ import datetime
 
 import pytz
 from graphql import GraphQLError
-
 from pytest import fixture
 
 from ..datetime import Date, DateTime, Time
diff --git a/graphene/types/tests/test_mutation.py b/graphene/types/tests/test_mutation.py
index 4a7ad3c7..5564afab 100644
--- a/graphene/types/tests/test_mutation.py
+++ b/graphene/types/tests/test_mutation.py
@@ -2,12 +2,12 @@ from pytest import raises
 
 from ..argument import Argument
 from ..dynamic import Dynamic
+from ..interface import Interface
 from ..mutation import Mutation
 from ..objecttype import ObjectType
 from ..scalars import String
 from ..schema import Schema
 from ..structures import NonNull
-from ..interface import Interface
 
 
 class MyType(Interface):
diff --git a/graphene/types/tests/test_query.py b/graphene/types/tests/test_query.py
index 2d3e4c73..14324d69 100644
--- a/graphene/types/tests/test_query.py
+++ b/graphene/types/tests/test_query.py
@@ -1,13 +1,9 @@
 import json
 from functools import partial
 
-from graphql import (
-    GraphQLError,
-    GraphQLResolveInfo as ResolveInfo,
-    Source,
-    execute,
-    parse,
-)
+from graphql import GraphQLError
+from graphql import GraphQLResolveInfo as ResolveInfo
+from graphql import Source, execute, parse
 
 from ..context import Context
 from ..dynamic import Dynamic
diff --git a/graphene/types/tests/test_resolver.py b/graphene/types/tests/test_resolver.py
index dcadb6d8..8b97fa27 100644
--- a/graphene/types/tests/test_resolver.py
+++ b/graphene/types/tests/test_resolver.py
@@ -1,7 +1,7 @@
 from ..resolver import (
     attr_resolver,
-    dict_resolver,
     dict_or_attr_resolver,
+    dict_resolver,
     get_default_resolver,
     set_default_resolver,
 )
diff --git a/graphene/types/tests/test_scalar.py b/graphene/types/tests/test_scalar.py
index 2ff67208..0e924fcb 100644
--- a/graphene/types/tests/test_scalar.py
+++ b/graphene/types/tests/test_scalar.py
@@ -1,6 +1,7 @@
-from ..scalars import Scalar, Int, BigInt
 from graphql.language.ast import IntValueNode
 
+from ..scalars import BigInt, Int, Scalar
+
 
 def test_scalar():
     class JSONScalar(Scalar):
diff --git a/graphene/types/tests/test_scalars_serialization.py b/graphene/types/tests/test_scalars_serialization.py
index a95e8bd4..a91efe2c 100644
--- a/graphene/types/tests/test_scalars_serialization.py
+++ b/graphene/types/tests/test_scalars_serialization.py
@@ -38,7 +38,7 @@ def test_serializes_output_string():
     assert String.serialize(-1.1) == "-1.1"
     assert String.serialize(True) == "true"
     assert String.serialize(False) == "false"
-    assert String.serialize(u"\U0001F601") == u"\U0001F601"
+    assert String.serialize("\U0001F601") == "\U0001F601"
 
 
 def test_serializes_output_boolean():
diff --git a/graphene/types/tests/test_schema.py b/graphene/types/tests/test_schema.py
index 54c48b4f..e65c724b 100644
--- a/graphene/types/tests/test_schema.py
+++ b/graphene/types/tests/test_schema.py
@@ -1,6 +1,6 @@
-from graphql.type import GraphQLObjectType, GraphQLSchema
 from graphql import GraphQLError
-from pytest import mark, raises, fixture
+from graphql.type import GraphQLObjectType, GraphQLSchema
+from pytest import fixture, mark, raises
 
 from graphene.tests.utils import dedent
 
diff --git a/graphene/types/tests/test_subscribe_async.py b/graphene/types/tests/test_subscribe_async.py
index 9b7a1f13..b68f6875 100644
--- a/graphene/types/tests/test_subscribe_async.py
+++ b/graphene/types/tests/test_subscribe_async.py
@@ -1,6 +1,6 @@
 from pytest import mark
 
-from graphene import ObjectType, Int, String, Schema, Field
+from graphene import Field, Int, ObjectType, Schema, String
 
 
 class Query(ObjectType):
diff --git a/graphene/types/tests/test_type_map.py b/graphene/types/tests/test_type_map.py
index 334eb241..c3a9f907 100644
--- a/graphene/types/tests/test_type_map.py
+++ b/graphene/types/tests/test_type_map.py
@@ -18,8 +18,8 @@ from ..inputobjecttype import InputObjectType
 from ..interface import Interface
 from ..objecttype import ObjectType
 from ..scalars import Int, String
-from ..structures import List, NonNull
 from ..schema import Schema
+from ..structures import List, NonNull
 
 
 def create_type_map(types, auto_camelcase=True):
diff --git a/graphene/types/union.py b/graphene/types/union.py
index 928656ae..44f1086f 100644
--- a/graphene/types/union.py
+++ b/graphene/types/union.py
@@ -4,9 +4,10 @@ from .unmountedtype import UnmountedType
 # For static type checking with Mypy
 MYPY = False
 if MYPY:
-    from .objecttype import ObjectType  # NOQA
     from typing import Iterable, Type  # NOQA
 
+    from .objecttype import ObjectType  # NOQA
+
 
 class UnionOptions(BaseOptions):
     types = ()  # type: Iterable[Type[ObjectType]]
diff --git a/graphene/types/uuid.py b/graphene/types/uuid.py
index c21eb165..5e49ebfe 100644
--- a/graphene/types/uuid.py
+++ b/graphene/types/uuid.py
@@ -1,4 +1,5 @@
 from __future__ import absolute_import
+
 from uuid import UUID as _UUID
 
 from graphql.language.ast import StringValueNode
diff --git a/graphene/utils/orderedtype.py b/graphene/utils/orderedtype.py
index fb8783d2..294ad54e 100644
--- a/graphene/utils/orderedtype.py
+++ b/graphene/utils/orderedtype.py
@@ -36,4 +36,4 @@ class OrderedType:
         return NotImplemented
 
     def __hash__(self):
-        return hash((self.creation_counter))
+        return hash(self.creation_counter)
diff --git a/graphene/utils/tests/test_deduplicator.py b/graphene/utils/tests/test_deduplicator.py
index b845caf1..1c79dc30 100644
--- a/graphene/utils/tests/test_deduplicator.py
+++ b/graphene/utils/tests/test_deduplicator.py
@@ -1,4 +1,5 @@
 import datetime
+
 import graphene
 from graphene import relay
 from graphene.types.resolver import dict_resolver
diff --git a/setup.cfg b/setup.cfg
index f2b56221..5484fa19 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,7 +1,7 @@
 [flake8]
 exclude = setup.py,docs/*,*/examples/*,tests
 max-line-length = 120
-
+ignore = E741, W503
 [coverage:run]
 omit = */tests/*,graphene/types/scalars.py
 
@@ -9,6 +9,9 @@ omit = */tests/*,graphene/types/scalars.py
 profile = black
 known_first_party=graphene
 
+[black]
+target-version = ['py37']
+
 [mypy]
 ignore_missing_imports = True