diff --git a/requirements.txt b/requirements.txt
index e786569..a5aead9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ progressbar==2.3
 pyaml==13.12.0
 pycparser==2.10
 pycrypto==2.6.1
-pyOpenSSL==0.14
+pyOpenSSL==17.5.0
 python-dateutil==2.2
 PyYAML==3.10
 requests==2.2.1
diff --git a/setup.py b/setup.py
index 53685d6..25f97fb 100644
--- a/setup.py
+++ b/setup.py
@@ -80,7 +80,7 @@ def pep386adapt(version):
           'Twisted>=13.2, <14',
           'crochet>=1.0.0, <2',
           'treq>=0.2.0, <0.3',
-          'pyOpenSSL>=0.13, <1',
+          'pyOpenSSL>=0.13, <18',
           'thrift>=0.9, <1',
           'blessed>=1.8.3, <2',
           'lacore>=0.1.3.1, <2',