diff --git a/main.ts b/main.ts
index c374c25..48b875b 100644
--- a/main.ts
+++ b/main.ts
@@ -324,8 +324,7 @@ class TimestampModal extends Modal {
 
         timezone.onchange = (ev: Event) => {
             const offset = (ev.target as HTMLInputElement).value;
-
-            let date = moment.tz(input.value, moment.ISO_8601, offset)
+            const date = moment.tz(input.value, moment.ISO_8601, offset)
 
             setClickEvents(date);
         }
@@ -404,7 +403,7 @@ class TimestampModal extends Modal {
         input.onchange = (ev: Event) => {
             const value = (ev.target as HTMLInputElement).value;
             const offset = timezone.value;
-            let date = moment.tz(value, moment.ISO_8601, offset)
+            const date = moment.tz(value, moment.ISO_8601, offset)
 
             setClickEvents(date);
         }