diff --git a/packages/example/src/main.tsx b/packages/example/src/main.tsx
index 8fe1e6d..89b9eb4 100644
--- a/packages/example/src/main.tsx
+++ b/packages/example/src/main.tsx
@@ -1,5 +1,6 @@
 import { FetchHttpClient } from "@effect/platform"
 import { Clipboard, Geolocation, Permissions } from "@effect/platform-browser"
+import { QueryClient } from "@reffuse/extension-query"
 import { createRouter, RouterProvider } from "@tanstack/react-router"
 import { Layer } from "effect"
 import { StrictMode } from "react"
@@ -14,6 +15,7 @@ const layer = Layer.empty.pipe(
     Layer.provideMerge(Geolocation.layer),
     Layer.provideMerge(Permissions.layer),
     Layer.provideMerge(FetchHttpClient.layer),
+    Layer.provideMerge(QueryClient.layer()),
 )
 
 const router = createRouter({ routeTree })
diff --git a/packages/example/src/reffuse.ts b/packages/example/src/reffuse.ts
index c5d008f..e0b405e 100644
--- a/packages/example/src/reffuse.ts
+++ b/packages/example/src/reffuse.ts
@@ -1,7 +1,7 @@
 import { HttpClient } from "@effect/platform"
 import { Clipboard, Geolocation, Permissions } from "@effect/platform-browser"
 import { LazyRefExtension } from "@reffuse/extension-lazyref"
-import { QueryExtension } from "@reffuse/extension-query"
+import { ErrorHandler, QueryClient, QueryExtension } from "@reffuse/extension-query"
 import { Reffuse, ReffuseContext } from "reffuse"
 
 
@@ -10,6 +10,8 @@ export const GlobalContext = ReffuseContext.make<
     | Geolocation.Geolocation
     | Permissions.Permissions
     | HttpClient.HttpClient
+    | QueryClient.QueryClient<ErrorHandler.DefaultErrorHandler, never>
+    | ErrorHandler.DefaultErrorHandler
 >()
 
 export class GlobalReffuse extends Reffuse.Reffuse.pipe(