diff --git a/packages/kit/src/runtime/server/endpoint.js b/packages/kit/src/runtime/server/endpoint.js
index ab6cbfc027e6..338791b4d0b1 100644
--- a/packages/kit/src/runtime/server/endpoint.js
+++ b/packages/kit/src/runtime/server/endpoint.js
@@ -29,7 +29,9 @@ export async function render_endpoint(event, route) {
 		return method_not_allowed(mod, method);
 	}
 
-	const response = await handler(event);
+	const response = await handler(
+		/** @type {import('types').RequestEvent<Record<string, any>>} */ (event)
+	);
 
 	if (!(response instanceof Response)) {
 		return new Response(
diff --git a/packages/kit/src/runtime/server/page/render.js b/packages/kit/src/runtime/server/page/render.js
index 835b0b7b0986..31d9f494a8dd 100644
--- a/packages/kit/src/runtime/server/page/render.js
+++ b/packages/kit/src/runtime/server/page/render.js
@@ -86,7 +86,7 @@ export async function render_response({
 			/** @type {import('types').Page} */
 			page: {
 				error,
-				params: event.params,
+				params: /** @type {Record<string, any>} */ (event.params),
 				routeId: event.routeId,
 				status,
 				url: state.prerendering ? new PrerenderingURL(event.url) : event.url,
diff --git a/packages/kit/src/runtime/server/page/types.d.ts b/packages/kit/src/runtime/server/page/types.d.ts
index 556496ee3486..c3230ddf995a 100644
--- a/packages/kit/src/runtime/server/page/types.d.ts
+++ b/packages/kit/src/runtime/server/page/types.d.ts
@@ -1,4 +1,4 @@
-import { JSONValue, ResponseHeaders, SSRNode, CspDirectives } from 'types';
+import { ResponseHeaders, SSRNode, CspDirectives } from 'types';
 import { HttpError } from '../../../index/private';
 
 export interface Fetched {
@@ -21,7 +21,7 @@ export interface FetchState {
 export type Loaded = {
 	node: SSRNode;
 	data: Record<string, any> | null;
-	server_data: JSONValue;
+	server_data: any;
 };
 
 type CspMode = 'hash' | 'nonce' | 'auto';