diff --git a/src/controllers/groups_controller.rs b/src/controllers/groups_controller.rs
index 45a131d..d1255ea 100644
--- a/src/controllers/groups_controller.rs
+++ b/src/controllers/groups_controller.rs
@@ -267,7 +267,8 @@ pub fn cancel_request(r: &mut HttpRequestHandler) -> RequestResult {
 
     groups_helper::delete_member(&group_id, &r.user_id()?)?;
 
-    // TODO : delete any related notification
+    // Delete any related notification
+    notifications_helper::delete_all_related_to_group_membership_notifications(r.user_id_ref()?, &group_id)?;
 
     r.success("The request has been successfully cancelled!")
 }