diff --git a/sources/extra_files/app/requirements-ynh.txt b/sources/extra_files/app/requirements-ynh.txt
index 5c59707..cb0c161 100644
--- a/sources/extra_files/app/requirements-ynh.txt
+++ b/sources/extra_files/app/requirements-ynh.txt
@@ -11,6 +11,7 @@ pyopenssl==19.1.0
 python-dateutil==2.8.1
 pyyaml==5.4.1
 requests[socks]==2.25.1
+cryptography==3.1.1
 
 # Additionnals requirements
 markupsafe>=0.23