diff --git a/setup.py b/setup.py
index 39d3a59..a54ec70 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from distutils.core import setup
+from setuptools import setup
 
 packages = \
 ['poetry',
@@ -44,8 +44,8 @@ install_requires = \
  'jsonschema>=3.0a3,<4.0',
  'pkginfo>=1.4,<2.0',
  'pyparsing>=2.2,<3.0',
- 'pyrsistent>=0.14.2,<0.15.0',
- 'requests-toolbelt>=0.8.0,<0.9.0',
+ 'pyrsistent>=0.14.2',
+ 'requests-toolbelt',
  'requests>=2.18,<3.0',
  'shellingham>=1.1,<2.0',
  'tomlkit>=0.5.1,<0.6.0']