diff --git a/requirements.txt b/requirements.txt
index 7fef4a5..03a45cf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ PyYAML==3.11
 Pygments==2.0.2
 Werkzeug==0.10.4
 cffi==1.1.0
-cryptography==0.9
+cryptography==3.2
 docopt==0.6.2
 enum34==1.0.4
 flask-swagger==0.2.6