Move to cryptography 2.5 and stop using deprecated APIs.

Fixes #1369

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index c8a0169c..6c366ce1 100644
--- a/setup.py
+++ b/setup.py
@@ -71,5 +71,5 @@ setup(
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
     ],
-    install_requires=["bcrypt>=3.1.3", "cryptography>=1.5", "pynacl>=1.0.1"],
+    install_requires=["bcrypt>=3.1.3", "cryptography>=2.5", "pynacl>=1.0.1"],
 )