diff --git a/app/[locale]/(index)/page.tsx b/app/[locale]/(index)/page.tsx
index 842523abc..e9a78f89b 100644
--- a/app/[locale]/(index)/page.tsx
+++ b/app/[locale]/(index)/page.tsx
@@ -2,6 +2,7 @@ import { createUrlSearchParams } from "@acdh-oeaw/lib";
 import type { Metadata, ResolvingMetadata } from "next";
 import { useTranslations } from "next-intl";
 import { getTranslations, unstable_setRequestLocale as setRequestLocale } from "next-intl/server";
+import * as v from "valibot";
 
 import { MainContent } from "@/components/main-content";
 import { ResourcesSection } from "@/components/resources-section";
@@ -48,7 +49,7 @@ export default function IndexPage(props: IndexPageProps) {
 
 	const searchParamsSchema = createResourceFiltersSearchParamsSchema(locale);
 
-	const filters = searchParamsSchema.parse({
+	const filters = v.parse(searchParamsSchema, {
 		limit: urlSearchParams.get("limit"),
 		locale: urlSearchParams.get("locale"),
 		page: urlSearchParams.get("page"),
diff --git a/app/[locale]/curricula/page.tsx b/app/[locale]/curricula/page.tsx
index cd371e7dd..868bcdd3c 100644
--- a/app/[locale]/curricula/page.tsx
+++ b/app/[locale]/curricula/page.tsx
@@ -2,6 +2,7 @@ import { createUrlSearchParams } from "@acdh-oeaw/lib";
 import type { Metadata, ResolvingMetadata } from "next";
 import { useTranslations } from "next-intl";
 import { getTranslations, unstable_setRequestLocale as setRequestLocale } from "next-intl/server";
+import * as v from "valibot";
 
 import { CurriculaSection } from "@/components/curricula-section";
 import { MainContent } from "@/components/main-content";
@@ -44,7 +45,7 @@ export default function CurriculaPage(props: CurriculaPageProps) {
 
 	const searchParamsSchema = createResourceFiltersSearchParamsSchema(locale);
 
-	const filters = searchParamsSchema.parse({
+	const filters = v.parse(searchParamsSchema, {
 		limit: urlSearchParams.get("limit"),
 		locale: urlSearchParams.get("locale"),
 		page: urlSearchParams.get("page"),
diff --git a/app/[locale]/resources/page.tsx b/app/[locale]/resources/page.tsx
index aee3dc80f..5c1ea8474 100644
--- a/app/[locale]/resources/page.tsx
+++ b/app/[locale]/resources/page.tsx
@@ -2,6 +2,7 @@ import { createUrlSearchParams } from "@acdh-oeaw/lib";
 import type { Metadata, ResolvingMetadata } from "next";
 import { useTranslations } from "next-intl";
 import { getTranslations, unstable_setRequestLocale as setRequestLocale } from "next-intl/server";
+import * as v from "valibot";
 
 import { MainContent } from "@/components/main-content";
 import { ResourcesSection } from "@/components/resources-section";
@@ -44,7 +45,7 @@ export default function ResourcesPage(props: ResourcesPageProps) {
 
 	const searchParamsSchema = createResourceFiltersSearchParamsSchema(locale);
 
-	const filters = searchParamsSchema.parse({
+	const filters = v.parse(searchParamsSchema, {
 		limit: urlSearchParams.get("limit"),
 		locale: urlSearchParams.get("locale"),
 		page: urlSearchParams.get("page"),
diff --git a/app/api/metadata/curricula/route.ts b/app/api/metadata/curricula/route.ts
index 76d4f1b37..7c71d25fb 100644
--- a/app/api/metadata/curricula/route.ts
+++ b/app/api/metadata/curricula/route.ts
@@ -3,21 +3,21 @@ import { join } from "node:path";
 
 import { log } from "@acdh-oeaw/lib";
 import type { NextRequest } from "next/server";
-import { z } from "zod";
+import * as v from "valibot";
 
 import type { Resource } from "@/lib/content/types";
 
 const filePath = join(process.cwd(), "./public/metadata/curricula.json");
 
-const searchParamsSchema = z.object({
-	limit: z.coerce.number().int().positive().max(100).optional().default(10),
-	offset: z.coerce.number().int().nonnegative().optional().default(0),
+const searchParamsSchema = v.object({
+	limit: v.optional(v.coerce(v.number([v.integer(), v.minValue(1), v.maxValue(100)]), Number), 10),
+	offset: v.optional(v.coerce(v.number([v.integer(), v.minValue(0)]), Number), 0),
 });
 
 export async function GET(request: NextRequest) {
 	const { searchParams } = request.nextUrl;
 
-	const result = searchParamsSchema.safeParse({
+	const result = v.safeParse(searchParamsSchema, {
 		limit: searchParams.get("limit"),
 		offset: searchParams.get("offset"),
 	});
@@ -26,7 +26,7 @@ export async function GET(request: NextRequest) {
 		return Response.json({ message: "Bad request" }, { status: 400 });
 	}
 
-	const { offset, limit } = result.data;
+	const { offset, limit } = result.output;
 
 	try {
 		const curricula = await readCurricula();
diff --git a/app/api/metadata/resources/route.ts b/app/api/metadata/resources/route.ts
index 91b7c72fc..4876a66a9 100644
--- a/app/api/metadata/resources/route.ts
+++ b/app/api/metadata/resources/route.ts
@@ -3,21 +3,21 @@ import { join } from "node:path";
 
 import { log } from "@acdh-oeaw/lib";
 import type { NextRequest } from "next/server";
-import { z } from "zod";
+import * as v from "valibot";
 
 import type { Resource } from "@/lib/content/types";
 
 const filePath = join(process.cwd(), "./public/metadata/resources.json");
 
-const searchParamsSchema = z.object({
-	limit: z.coerce.number().int().positive().max(100).optional().default(10),
-	offset: z.coerce.number().int().nonnegative().optional().default(0),
+const searchParamsSchema = v.object({
+	limit: v.optional(v.coerce(v.number([v.integer(), v.minValue(1), v.maxValue(100)]), Number), 10),
+	offset: v.optional(v.coerce(v.number([v.integer(), v.minValue(0)]), Number), 0),
 });
 
 export async function GET(request: NextRequest) {
 	const { searchParams } = request.nextUrl;
 
-	const result = searchParamsSchema.safeParse({
+	const result = v.safeParse(searchParamsSchema, {
 		limit: searchParams.get("limit"),
 		offset: searchParams.get("offset"),
 	});
@@ -26,7 +26,7 @@ export async function GET(request: NextRequest) {
 		return Response.json({ message: "Bad request" }, { status: 400 });
 	}
 
-	const { offset, limit } = result.data;
+	const { offset, limit } = result.output;
 
 	try {
 		const resources = await readResources();
diff --git a/components/curricula-filter-form.tsx b/components/curricula-filter-form.tsx
index 704dc255b..32378a6f8 100644
--- a/components/curricula-filter-form.tsx
+++ b/components/curricula-filter-form.tsx
@@ -4,7 +4,7 @@ import { createUrlSearchParams } from "@acdh-oeaw/lib";
 import { useOptimistic, useState } from "react";
 import { ListBox, ListBoxItem, type Selection } from "react-aria-components";
 import { useFormState } from "react-dom";
-import { z } from "zod";
+import * as v from "valibot";
 
 import { SelectField, SelectItem } from "@/components/ui/blocks/select-field";
 import { TextInputField } from "@/components/ui/blocks/text-input-field";
@@ -16,13 +16,13 @@ import { getFormData } from "@/lib/get-form-data";
 import { useRouter } from "@/lib/navigation";
 import { cn } from "@/lib/styles";
 
-const formSchema = z.object({
-	locale: z.enum([...locales, "all"]).optional(),
-	q: z.string().optional(),
-	tag: z.array(z.string()).optional(),
+const formSchema = v.object({
+	locale: v.optional(v.picklist([...locales, "all"])),
+	q: v.optional(v.string()),
+	tag: v.optional(v.array(v.string())),
 });
 
-type FormSchema = z.infer<typeof formSchema>;
+type FormSchema = v.Output<typeof formSchema>;
 
 interface CurriculaFilterFormProps {
 	filters: FormSchema;
@@ -49,7 +49,7 @@ export function CurriculaFilterForm(props: CurriculaFilterFormProps) {
 
 	function action(prevState: undefined, formData: FormData) {
 		const input = getFormData(formData);
-		const filters = formSchema.parse(input);
+		const filters = v.parse(formSchema, input);
 
 		updateOptimisticFilters(filters);
 		router.push("?" + String(createUrlSearchParams(filters)));
diff --git a/components/resources-filter-form.tsx b/components/resources-filter-form.tsx
index c352c9f41..0629e512c 100644
--- a/components/resources-filter-form.tsx
+++ b/components/resources-filter-form.tsx
@@ -4,7 +4,7 @@ import { createUrlSearchParams } from "@acdh-oeaw/lib";
 import { useOptimistic, useState } from "react";
 import { ListBox, ListBoxItem, type Selection } from "react-aria-components";
 import { useFormState } from "react-dom";
-import { z } from "zod";
+import * as v from "valibot";
 
 import { SelectField, SelectItem } from "@/components/ui/blocks/select-field";
 import { TextInputField } from "@/components/ui/blocks/text-input-field";
@@ -16,13 +16,13 @@ import { getFormData } from "@/lib/get-form-data";
 import { useRouter } from "@/lib/navigation";
 import { cn } from "@/lib/styles";
 
-const formSchema = z.object({
-	locale: z.enum([...locales, "all"]).optional(),
-	q: z.string().optional(),
-	tag: z.array(z.string()).optional(),
+const formSchema = v.object({
+	locale: v.optional(v.picklist([...locales, "all"])),
+	q: v.optional(v.string()),
+	tag: v.optional(v.array(v.string())),
 });
 
-type FormSchema = z.infer<typeof formSchema>;
+type FormSchema = v.Output<typeof formSchema>;
 
 interface ResourcesFilterFormProps {
 	filters: FormSchema;
@@ -49,7 +49,7 @@ export function ResourcesFilterForm(props: ResourcesFilterFormProps) {
 
 	function action(prevState: undefined, formData: FormData) {
 		const input = getFormData(formData);
-		const filters = formSchema.parse(input);
+		const filters = v.parse(formSchema, input);
 
 		updateOptimisticFilters(filters);
 		router.push("?" + String(createUrlSearchParams(filters)));
diff --git a/lib/schemas/resource-filter-schema.ts b/lib/schemas/resource-filter-schema.ts
index a09276282..2d5fea7a6 100644
--- a/lib/schemas/resource-filter-schema.ts
+++ b/lib/schemas/resource-filter-schema.ts
@@ -1,17 +1,16 @@
-import { z } from "zod";
+import * as v from "valibot";
 
 import { type Locale, locales } from "@/config/i18n.config";
 
 export function createResourceFiltersSearchParamsSchema(locale: Locale) {
-	return z.object({
-		limit: z.coerce.number().int().positive().max(100).optional().default(20).catch(20),
-		locale: z
-			.enum([...locales, "all"])
-			.optional()
-			.default(locale)
-			.catch(locale),
-		page: z.coerce.number().int().positive().optional().default(1).catch(1),
-		q: z.string().optional().default("").catch(""),
-		tag: z.array(z.string()).optional().default([]).catch([]),
+	return v.object({
+		limit: v.fallback(
+			v.optional(v.coerce(v.number([v.integer(), v.minValue(1), v.maxValue(100)]), Number), 20),
+			20,
+		),
+		locale: v.fallback(v.optional(v.picklist([...locales, "all"]), locale), locale),
+		page: v.fallback(v.optional(v.coerce(v.number([v.integer(), v.minValue(1)]), Number), 1), 1),
+		q: v.fallback(v.optional(v.string(), ""), ""),
+		tag: v.fallback(v.optional(v.array(v.string()), []), []),
 	});
 }