diff --git a/covid19-site/src/main/resources/templates/main-page.html b/covid19-site/src/main/resources/templates/main-page.html
index d7be108..50d73b8 100644
--- a/covid19-site/src/main/resources/templates/main-page.html
+++ b/covid19-site/src/main/resources/templates/main-page.html
@@ -93,7 +93,11 @@
                         : 0
                 );
 
-                var myChart = new Chart(ctx, {
+                if (window.myChart) {
+                    window.myChart.destroy();
+                }
+
+                window.myChart = new Chart(ctx, {
                     type: 'line',
                     data: {
                         labels: labels,