diff --git a/requirements.txt b/requirements.txt
index 4badee3..0246cfc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ click==6.7
 configparser==3.5.0
 contextlib2==0.5.5
 coverage==4.4.1
-cryptography==2.1.1
+cryptography==2.3
 dnspython==1.15.0
 email-validator==1.0.2
 enum34==1.1.6