diff --git a/src/main.rs b/src/main.rs
index cb34b31..29d2cd5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -88,6 +88,7 @@ impl BotController {
 pub enum BotError {
     DBError(#[from] DbError),
     TeloxideError(#[from] teloxide::RequestError),
+    // TODO: not a really good to hardcode types, better to extend it later
     StorageError(#[from] mongodb_storage::MongodbStorageError<<Json as Serializer<State>>::Error>),
 }