diff --git a/requirements.txt b/requirements.txt
index 6c089ec1b..4407e3b01 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,6 +13,7 @@ psutil==5.4.7
 pillow==5.3.0
 chardet==3.0.4
 flask-sqlalchemy==2.3.2
+cryptography==2.9.2
 requests==2.20.0
 ConfigParser==3.5.0
 MySQL-python==1.2.5