diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index a9dc64c..b267b27 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -21,8 +21,8 @@
 
     let { data }: Props = $props();
 
-    let days = daysUntilBirthday(data.birthday);
-    let time = getTimeIn(data.timezone);
+    let days = $derived(daysUntilBirthday(data.birthday));
+    let time = $derived(getTimeIn(data.timezone));
     let charAmount = $state(0);
     let webring = $page.url.searchParams.has('webring');