diff --git a/pentesting/pentesting-web/flask.md b/pentesting/pentesting-web/flask.md
index d90cdd75..e54643b4 100644
--- a/pentesting/pentesting-web/flask.md
+++ b/pentesting/pentesting-web/flask.md
@@ -4,6 +4,8 @@
 
 ## Cookies
 
+Default cookie session name is **`session`**.
+
 ### Decoder
 
 Online Flask coockies decoder: [https://www.kirsle.net/wizards/flask-session.cgi](https://www.kirsle.net/wizards/flask-session.cgi)