diff --git a/src/ui.rs b/src/ui.rs
index 5d9007e..a9caaf9 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -51,6 +51,8 @@ enum Mode {
     Log,
 }
 
+// TODO Add Error for anything that can go wrong while rendering
+
 pub struct Ui {
     event_tx: UnboundedSender<UiEvent>,
 
diff --git a/src/ui/widgets.rs b/src/ui/widgets.rs
index f9ebba1..33c2c49 100644
--- a/src/ui/widgets.rs
+++ b/src/ui/widgets.rs
@@ -21,6 +21,8 @@ pub mod text;
 use async_trait::async_trait;
 use toss::frame::{Frame, Size};
 
+// TODO Add Error type and return Result-s (at least in Widget::render)
+
 #[async_trait]
 pub trait Widget {
     fn size(&self, frame: &mut Frame, max_width: Option<u16>, max_height: Option<u16>) -> Size;