diff --git a/requirements-dev.txt b/requirements-dev.txt
index cc9dafd..407b075 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,6 +10,6 @@ aiopg[sa]==0.13.2
 aioredis==1.1.0
 hiredis==0.2.0
 passlib==1.7.1
-cryptography==2.1.4
+cryptography==2.2
 aiohttp==3.0.7
 pytest-aiohttp==0.3.0