diff --git a/docs/flask.md b/docs/flask.md
index a98e6a998..fd660082f 100644
--- a/docs/flask.md
+++ b/docs/flask.md
@@ -2,7 +2,7 @@
 
 Dynaconf provides a drop in replacement for `app.config`.
 
-As Flask encourages the composition by overriding the `config_class` attribute this extension follows the [patterns of Flask](http://flask.pocoo.org/docs/0.12/patterns/subclassing/) and turns your Flask's `app.config` in to a `dynaconf` instance.
+As Flask encourages the composition by overriding the `config_class` attribute this extension follows the [patterns of Flask](https://flask.palletsprojects.com/en/2.3.x/patterns/subclassing/) and turns your Flask's `app.config` in to a `dynaconf` instance.
 
 ## Initialize the extension