diff --git a/requirements.txt b/requirements.txt
index fde87b4..f2c9e7a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ certifi==2018.1.18
 cffi==1.11.4
 chardet==3.0.4
 click==6.7
-cryptography==2.1.4
+cryptography==3.2
 Flask==0.12.2
 idna==2.6
 itsdangerous==0.24