diff --git a/LICENSE b/LICENSE
index 33973268..84d20f65 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,8 +1,8 @@
 MIT License
 
-Copyright (c) 2017-2018 Facebook, Inc. (GraphQL.js)
-Copyright (c) 2016 Syrus Akbary (GraphQL-core)
-Copyright (c) 2018 Christoph Zwerschke (GraphQL-core-next)
+Copyright (c) 2017-2019 Facebook, Inc. (GraphQL.js)
+Copyright (c) 2016-2017 Syrus Akbary (GraphQL-core)
+Copyright (c) 2018-2019 Christoph Zwerschke (GraphQL-core-next)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index fed0d466..f0a37bdf 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ a query language for APIs created by Facebook.
 [![Python 3 Status](https://pyup.io/repos/github/graphql-python/graphql-core-next/python-3-shield.svg)](https://pyup.io/repos/github/graphql-python/graphql-core-next/)
 [![Code Style](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)
 
-The current version 1.0.1 of GraphQL-core-next is up-to-date with GraphQL.js version
+The current version 1.0.2 of GraphQL-core-next is up-to-date with GraphQL.js version
 14.1.1. All parts of the API are covered by an extensive test suite of currently 1723
 unit tests.
 
diff --git a/docs/conf.py b/docs/conf.py
index 58b366a2..d6a1fbb9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -51,7 +51,7 @@
 
 # General information about the project.
 project = u'GraphQL-core-next'
-copyright = u'2018, Christoph Zwerschke'
+copyright = u'2019, Christoph Zwerschke'
 author = u'Christoph Zwerschke'
 
 # The version info for the project you're documenting, acts as replacement for
@@ -61,7 +61,7 @@
 # The short X.Y version.
 version = u'1.0'
 # The full version, including alpha/beta/rc tags.
-release = u'1.0.1'
+release = u'1.0.2'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/graphql/__init__.py b/graphql/__init__.py
index c57de693..fdcd10a3 100644
--- a/graphql/__init__.py
+++ b/graphql/__init__.py
@@ -37,7 +37,7 @@
   - :mod:`graphql/subscription`: Subscribe to data updates.
 """
 
-__version__ = "1.0.1"
+__version__ = "1.0.2"
 __version_js__ = "14.1.1"
 
 # The primary entry point into fulfilling a GraphQL request.
@@ -305,7 +305,7 @@
 )
 
 # Create, format, and print GraphQL errors.
-from .error import GraphQLError, format_error, print_error
+from .error import GraphQLError, format_error, print_error, INVALID
 
 # Utilities for operating on GraphQL type schema and parsed sources.
 from .utilities import (
@@ -598,6 +598,7 @@
     "GraphQLError",
     "format_error",
     "print_error",
+    "INVALID",
     "get_introspection_query",
     "get_operation_ast",
     "get_operation_root_type",
diff --git a/graphql/error/graphql_error.py b/graphql/error/graphql_error.py
index c5438cd4..d7a71a35 100644
--- a/graphql/error/graphql_error.py
+++ b/graphql/error/graphql_error.py
@@ -128,6 +128,7 @@ def __init__(
                 self.__context__ = original_error.__context__
             if not extensions:
                 try:
+                    # noinspection PyUnresolvedReferences
                     extensions = original_error.extensions  # type: ignore
                 except AttributeError:
                     pass
diff --git a/setup.cfg b/setup.cfg
index 9adaf7a5..d6f9c726 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.0.1
+current_version = 1.0.2
 commit = True
 tag = True