diff --git a/src/render/components/WaterLevel.vue b/src/render/components/WaterLevel.vue
index 72a668e..e4e552c 100644
--- a/src/render/components/WaterLevel.vue
+++ b/src/render/components/WaterLevel.vue
@@ -31,6 +31,7 @@ const option = reactive({
       color: 'transparency'
     },
     label: {
+      fontSize : 36,
       formatter: function({ value }) {
         return parseInt(value)
       }