diff --git a/requirements.txt b/requirements.txt
index 44b1d28..d0cbb7c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ certifi==2017.4.17
 cffi==1.10.0
 chardet==3.0.4
 constantly==15.1.0
-cryptography==1.8.1
+cryptography==3.2
 docutils==0.13.1
 enum34==1.1.6
 idna==2.5