diff --git a/scripts/install b/scripts/install
index 73c31c3..71b7e23 100755
--- a/scripts/install
+++ b/scripts/install
@@ -34,7 +34,7 @@ password=$YNH_APP_ARG_PASSWORD
 instance_name=$YNH_APP_ARG_NAME
 registration=$YNH_APP_ARG_REGISTRATION
 admin_email=$(ynh_user_get_info $admin 'mail')
-secret_key=$(ynh_string_random 64)
+secret_key=$(ynh_string_random 256)
 
 ### If it's a multi-instance app, meaning it can be installed several times independently
 ### The id of the app as stated in the manifest is available as $YNH_APP_ID