diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -33,8 +33,8 @@ setup(
     long_description=read('README.rst'),
     packages=find_packages(exclude='tests'),
     install_requires=[
-        'mock==1.0.1',
-        'six==1.9.0',
+        'mock~=1.0.1',
+        'six>=1.9.0',
         'requests',
     ],
     license='MIT',
fix: Use ranges for dependencies