diff --git a/requirements.txt b/requirements.txt
index 811d5f8..b455963 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ cffi==1.14.0
 chardet==3.0.4
 click==7.1.1
 configobj==5.0.6
-cryptography==2.9
+cryptography==3.3.2
 Flask==1.1.1
 Flask-Caching==1.8.0
 gunicorn==20.0.4