diff --git a/src/reactor_sim/dashboard.py b/src/reactor_sim/dashboard.py
index c5eae62..2a764e9 100644
--- a/src/reactor_sim/dashboard.py
+++ b/src/reactor_sim/dashboard.py
@@ -255,6 +255,10 @@ class ReactorDashboard:
             left_width = min(50, width - 18)
             right_width = width - left_width
 
+        data_height = max(1, data_height)
+        left_width = max(1, left_width)
+        right_width = max(1, right_width)
+
         data_win = stdscr.derwin(data_height, left_width, 0, 0)
         help_win = stdscr.derwin(data_height, right_width, 0, left_width)
         status_win = stdscr.derwin(status_height, width, data_height, 0)