diff --git a/src/app/admin/events/[id]/event-prizes.tsx b/src/app/admin/events/[id]/event-prizes.tsx
index 49586407..836e5d7b 100644
--- a/src/app/admin/events/[id]/event-prizes.tsx
+++ b/src/app/admin/events/[id]/event-prizes.tsx
@@ -16,6 +16,7 @@ import {
 	SelectValue,
 } from "@/components/ui/select";
 import { useServerAction } from "@/hooks/use-server-action";
+import type { EventPrizeInput } from "@/lib/validators/event";
 
 type PrizeType = "badge" | "credits" | "pixels" | "points" | "item";
 
@@ -39,9 +40,10 @@ interface Props {
 export function EventPrizesManager({ eventId, prizes }: Props) {
 	const { run, isPending } = useServerAction();
 	const [showForm, setShowForm] = useState(false);
-	const [form, setForm] = useState({
+	const [form, setForm] = useState<EventPrizeInput>({
+		eventId,
 		position: prizes.length + 1,
-		prizeType: "badge" as PrizeType,
+		prizeType: "badge",
 		badgeCode: "",
 		credits: 0,
 		pixels: 0,
@@ -51,8 +53,7 @@ export function EventPrizesManager({ eventId, prizes }: Props) {
 
 	function handleAdd(e: React.FormEvent) {
 		e.preventDefault();
-		// biome-ignore lint/suspicious/noExplicitAny: explicitly chosen here, see surrounding code
-		run(() => addEventPrize({ eventId, ...form } as any), {
+		run(() => addEventPrize(form), {
 			successMessage: "Prize added!",
 			onSuccess: () => {
 				setShowForm(false);