diff --git a/bingo.py b/bingo.py
index 5e7a16e..6d635ec 100644
--- a/bingo.py
+++ b/bingo.py
@@ -96,7 +96,7 @@ class BingoDisplay(Static):
         self.input_field.value = str(self.board.seed)
 
     def on_input_submitted(self, event: Input.Submitted) -> None:
-        if event.validation_result:
+        if event.validation_result.is_valid:
             self.board.roll_board(int(event.value))
 
 class BingoBoard(Widget):