diff --git a/requirements.txt b/requirements.txt
index 3dc07d4..dfb9fbc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ asn1crypto==0.24.0
 certifi==2018.4.16
 cffi==1.11.5
 chardet==3.0.4
-cryptography==2.2.2
+cryptography==2.3
 enum34==1.1.6
 futures==3.2.0
 idna==2.6