diff --git a/requirements.txt b/requirements.txt
index 199f108..8eae2b1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ certifi==2017.4.17
 cffi==1.10.0
 chardet==3.0.3
 configparser==3.5.0
-cryptography==1.9
+cryptography==3.2
 enum34==1.1.6
 idna==2.5
 ipaddress==1.0.18