update requirements

requirements.txt

@@ -1,6 +1,7 @@
-cryptography>=0.9.3
+setuptools>=18.8.1
+cryptography>=1.3.1
 boto3>=1.1.3
 ruamel.yaml>=0.10.7
 ordereddict>=1.1
 simplejson>=3.8
-futures>=2.2.0
+futures>=3.0.5

setup.py

@@ -20,7 +20,10 @@ setup(
     zip_safe=True,
     long_description=README,
     install_requires=[
-        'ruamel.yaml>=0.10.7', 'boto3>=1.1.3', 'cryptography>=0.9.3'],
+        'ruamel.yaml>=0.10.7',
+        'boto3>=1.1.3',
+        'cryptography>=0.9.3',
+        'setuptools>=11.3'],
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Topic :: Software Development :: Libraries :: Python Modules",