diff --git a/src/controllers/groups_controller.rs b/src/controllers/groups_controller.rs
index 2e01183..b8229dc 100644
--- a/src/controllers/groups_controller.rs
+++ b/src/controllers/groups_controller.rs
@@ -171,7 +171,8 @@ pub fn cancel_invitation(r: &mut HttpRequestHandler) -> RequestResult {
 
     groups_helper::delete_member(&group_id, &user_id)?;
 
-    // TODO : delete related notifications
+    // Delete related notifications
+    notifications_helper::delete_all_related_to_group_membership_notifications(&user_id, &group_id)?;
 
     r.success("Membership invitation has been cancelled!")
 }