diff --git a/requirements.txt b/requirements.txt
index d27a47b..4c84f92 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ certifi==2017.11.5
 cffi==1.11.2
 chardet==3.0.4
 click==6.7
-cryptography==2.1.3
+cryptography==3.2
 Flask==0.12.2
 gunicorn==19.7.1
 idna==2.6