diff --git a/src/components/charts/ChartTimeBase.tsx b/src/components/charts/ChartTimeBase.tsx
index 7bd701e..783aa77 100644
--- a/src/components/charts/ChartTimeBase.tsx
+++ b/src/components/charts/ChartTimeBase.tsx
@@ -201,7 +201,7 @@ export const ChartTimeBase: React.FC<ChartTimeBaseProps> = ({options, dataParams
     let thisOptions = {}
     Object.assign(thisOptions, defaultOptions, options)
 
-    let newChart = new Chart(chartRef.current, {
+    let newChart = new Chart(chartRef.current ?? "", {
       type: 'line',
       plugins: [ChartDataLabels],
       options: thisOptions,