diff --git a/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx b/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx
index 37a2042f..ed653757 100644
--- a/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx
+++ b/frontend/components/dashboard/scan-terminal/LiveTemperatureThresholdChart.tsx
@@ -333,6 +333,7 @@ export function LiveTemperatureThresholdChart({
                   y={threshold}
                   stroke="#f97316"
                   strokeDasharray="4 3"
+                  strokeWidth={2}
                   label={{ value: `UMA ${threshold.toFixed(1)}°`, fill: "#f97316", fontSize: 10, position: "right" }}
                 />
               )}