diff --git a/codex-rs/tui/src/user_approval_widget.rs b/codex-rs/tui/src/user_approval_widget.rs
index 91febde2..70b355d7 100644
--- a/codex-rs/tui/src/user_approval_widget.rs
+++ b/codex-rs/tui/src/user_approval_widget.rs
@@ -47,6 +47,8 @@ pub(crate) enum ApprovalRequest {
 }
 
 /// Options displayed in the *select* mode.
+///
+/// The `key` is matched case-insensitively.
 struct SelectOption {
     label: Line<'static>,
     description: &'static str,
@@ -187,6 +189,16 @@ impl UserApprovalWidget<'_> {
         }
     }
 
+    /// Normalize a key for comparison.
+    /// - For `KeyCode::Char`, converts to lowercase for case-insensitive matching.
+    /// - Other key codes are returned unchanged.
+    fn normalize_keycode(code: KeyCode) -> KeyCode {
+        match code {
+            KeyCode::Char(c) => KeyCode::Char(c.to_ascii_lowercase()),
+            other => other,
+        }
+    }
+
     /// Handle Ctrl-C pressed by the user while the modal is visible.
     /// Behaves like pressing Escape: abort the request and close the modal.
     pub(crate) fn on_ctrl_c(&mut self) {
@@ -210,7 +222,12 @@ impl UserApprovalWidget<'_> {
                 self.send_decision(ReviewDecision::Abort);
             }
             other => {
-                if let Some(opt) = self.select_options.iter().find(|opt| opt.key == other) {
+                let normalized = Self::normalize_keycode(other);
+                if let Some(opt) = self
+                    .select_options
+                    .iter()
+                    .find(|opt| Self::normalize_keycode(opt.key) == normalized)
+                {
                     self.send_decision(opt.decision);
                 }
             }
@@ -330,3 +347,59 @@ impl WidgetRef for &UserApprovalWidget<'_> {
             );
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crossterm::event::KeyCode;
+    use crossterm::event::KeyEvent;
+    use crossterm::event::KeyModifiers;
+    use std::path::PathBuf;
+    use std::sync::mpsc::channel;
+
+    #[test]
+    fn lowercase_shortcut_is_accepted() {
+        let (tx_raw, rx) = channel::<AppEvent>();
+        let tx = AppEventSender::new(tx_raw);
+        let req = ApprovalRequest::Exec {
+            id: "1".to_string(),
+            command: vec!["echo".to_string()],
+            cwd: PathBuf::new(),
+            reason: None,
+        };
+        let mut widget = UserApprovalWidget::new(req, tx);
+        widget.handle_key_event(KeyEvent::new(KeyCode::Char('y'), KeyModifiers::NONE));
+        assert!(widget.is_complete());
+        let events: Vec<AppEvent> = rx.try_iter().collect();
+        assert!(events.iter().any(|e| matches!(
+            e,
+            AppEvent::CodexOp(Op::ExecApproval {
+                decision: ReviewDecision::Approved,
+                ..
+            })
+        )));
+    }
+
+    #[test]
+    fn uppercase_shortcut_is_accepted() {
+        let (tx_raw, rx) = channel::<AppEvent>();
+        let tx = AppEventSender::new(tx_raw);
+        let req = ApprovalRequest::Exec {
+            id: "2".to_string(),
+            command: vec!["echo".to_string()],
+            cwd: PathBuf::new(),
+            reason: None,
+        };
+        let mut widget = UserApprovalWidget::new(req, tx);
+        widget.handle_key_event(KeyEvent::new(KeyCode::Char('Y'), KeyModifiers::NONE));
+        assert!(widget.is_complete());
+        let events: Vec<AppEvent> = rx.try_iter().collect();
+        assert!(events.iter().any(|e| matches!(
+            e,
+            AppEvent::CodexOp(Op::ExecApproval {
+                decision: ReviewDecision::Approved,
+                ..
+            })
+        )));
+    }
+}