diff --git a/setup.py b/setup.py
index 8e3d51b89..86a55c4c2 100644
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,8 @@ setup(
 
     install_requires=[
         "pyasn1>=0.1.7",
-        "pyOpenSSL>=0.14",
+        "pyOpenSSL>=0.15.1",
+        "cryptography>=0.9",
         "passlib>=1.6.2"
     ],
     extras_require={
@@ -52,4 +53,4 @@ setup(
             "pathod>=%s, <%s" % (version.MINORVERSION, version.NEXT_MINORVERSION)
         ]
     }
-)
\ No newline at end of file
+)