diff --git a/setup.cfg b/setup.cfg
index bccff8a..34e51b5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,5 +5,5 @@ max-line-length = 160
 [isort]
 known_first_party=graphql
 
-[pytest]
+[tool:pytest]
 norecursedirs = venv .tox .cache
diff --git a/setup.py b/setup.py
index 4ec2bce..3929541 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 
 required_packages = [
-    'graphql-core>=2.1rc2', 'webob', 'graphql-server-core>=1.1rc0'
+    'graphql-core>=2.1rc2,<3', 'webob', 'graphql-server-core>=1.1rc0,<2'
 ]
 
 tests_require = ['pytest>=2.7.3', 'mako']