-cffi==1.10.0
-cryptography==1.9; python_version == '3.3'
-cryptography==2.3; python_version > '3.3'
--docker-pycreds==0.3.0
+-docker-pycreds==0.4.0
-enum34==1.1.6
-idna==2.5
-ipaddress==1.0.18
+cffi>=1.10.0
+cryptography>=1.9; python_version == '3.3'
+cryptography>=2.3; python_version > '3.3'
-+docker-pycreds>=0.3.0
++docker-pycreds>=0.4.0
+enum34>=1.1.6
+idna>=2.5
+ipaddress>=1.0.18