diff --git a/requirements/development.txt b/requirements/development.txt
index 0fec6da7..50ce5d1d 100644
--- a/requirements/development.txt
+++ b/requirements/development.txt
@@ -2,7 +2,7 @@
 
 bumpversion==0.5.3
 watchdog==0.8.3
-cryptography==1.8.2
+cryptography==1.9
 PyYAML==3.12
 coverage==4.4.1
 pep8==1.7.0