diff --git a/src/components/seal/DashboardChart.vue b/src/components/seal/DashboardChart.vue
index aad2622..2156761 100644
--- a/src/components/seal/DashboardChart.vue
+++ b/src/components/seal/DashboardChart.vue
@@ -17,9 +17,11 @@ watchEffect(() => {
   }
   if (myChart) {
     myChart.setOption({
-      series: [{
-        data: [{ value: pressure }],
-      }],
+      series: [
+        {
+          data: [{ value: Number(pressure || 0).toFixed(2) }],
+        },
+      ],
     })
   }
 })
@@ -53,7 +55,7 @@ const initChart = () => {
         },
         data: [
           {
-            value: realTimePressure.value,
+            value: Number(realTimePressure.value || 0).toFixed(2),
           },
         ],
       },
@@ -75,8 +77,8 @@ onUnmounted(() => {
 </template>
 
 <style>
-  canvas{
-    width: 60vw !important;
-    height: 70vh !important;
-  }
+canvas {
+  width: 60vw !important;
+  height: 70vh !important;
+}
 </style>