[UPGRADE] requirements

.travis.yml

@@ -1,3 +1,4 @@
+dist: precise
 language: python
 python:
 - '2.7'

requirements.txt

@@ -1,4 +1,4 @@
-lxml >= 3.5.0, < 4
+lxml
 nose
 mock
 coveralls
@@ -11,7 +11,7 @@ suds_requests >= 0.3
 defusedxml >= 0.4.1, < 0.6
 eight >= 0.3.0, < 0.5
 cryptography >= 1.8, < 3
-pyOpenSSL >= 16.0.0, < 17
+pyOpenSSL
 certifi >= 2015.11.20.1
 reportlab
 pytz

setup.py

@@ -43,7 +43,7 @@ later (LGPLv2+)',
         'suds_requests >= 0.3',
         'reportlab',
         'pytz',
-        'zeep < 3.3'
+        'zeep'
     ],
     test_suite='nose.collector',
     tests_require=[