diff --git a/components/ExerciseChart.vue b/components/ExerciseChart.vue
index 2355a32..e04ee29 100644
--- a/components/ExerciseChart.vue
+++ b/components/ExerciseChart.vue
@@ -54,8 +54,8 @@ const chartData = computed(() =>
 
     return {
       date: formattedDate,
-      warmUpSet: isNaN(maxWarmUpSetWeight) ? 0 : maxWarmUpSetWeight,
-      workingSet: isNaN(maxWorkingSetWeight) ? 0 : maxWorkingSetWeight,
+      warmUpSet: Number.isNaN(maxWarmUpSetWeight) ? 0 : maxWarmUpSetWeight,
+      workingSet: Number.isNaN(maxWorkingSetWeight) ? 0 : maxWorkingSetWeight,
     }
   }),
 )