diff --git a/dev-requirements.txt b/dev-requirements.txt
index ed3c171e..7bb1a412 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -17,7 +17,7 @@
 # http://nvie.com/posts/pin-your-packages/
 pycrypto==2.6.1
 pynacl==0.2.3
-cryptography==0.9
+cryptography==1.0
 
 # Testing requirements.  The rest of the testing dependencies available in
 # 'tox.ini'