diff --git a/requirements.txt b/requirements.txt
index 5de7ff2a..528bcf08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,6 +16,7 @@ oslo.utils>=3.28.0                                     # Apache Software License
 paramiko>=2.0.0                                        # LGPL
 pbr>=2.0.0,!=2.1.0                                     # Apache Software License
 PrettyTable>=0.7.1,<0.8                                # BSD
+pyOpenSSL>=16.2.0                                      # Apache License, Version 2.0
 PyYAML>=3.10                                           # MIT
 python-subunit>=0.0.18                                 # UNKNOWN
 requests>=2.14.2                                       # Apache License, Version 2.0