diff --git a/src/tui.rs b/src/tui.rs
index d0fb678..1acc74f 100644
--- a/src/tui.rs
+++ b/src/tui.rs
@@ -414,7 +414,7 @@ impl App {
 
     fn previous(&mut self) {
         if !self.agents.is_empty() {
-            self.selected = self.selected.checked_sub(1).unwrap_or(self.agents.len() - 1);
+            self.selected = self.selected.checked_sub(1).unwrap_or(self.agents.len().saturating_sub(1));
         }
     }