diff --git a/doc/06-Desktop-Notifications.md b/doc/06-Desktop-Notifications.md
index dcd81f30..0b0f2d47 100644
--- a/doc/06-Desktop-Notifications.md
+++ b/doc/06-Desktop-Notifications.md
@@ -68,6 +68,13 @@ daemon's configuration.
 </LocationMatch>
 ```
 
+!!! Note
+
+    The following modules need to be enabled in Apache for this configuration to work:
+    - `proxy`  
+    - `proxy_http`  
+    - `headers`
+
 **Nginx**
 
 ```