diff --git a/dev-packages/e2e-tests/test-applications/hono-4/src/entry.bun.ts b/dev-packages/e2e-tests/test-applications/hono-4/src/entry.bun.ts
index 2a27d1adb8a9..e057eb78d4c5 100644
--- a/dev-packages/e2e-tests/test-applications/hono-4/src/entry.bun.ts
+++ b/dev-packages/e2e-tests/test-applications/hono-4/src/entry.bun.ts
@@ -2,10 +2,9 @@ import { Hono } from 'hono';
 import { sentry } from '@sentry/hono/bun';
 import { addRoutes } from './routes';
 
-const app = new Hono<{ Bindings: { E2E_TEST_DSN: string } }>();
+const app = new Hono();
 
 app.use(
-  // @ts-expect-error - Env is not yet in type
   sentry(app, {
     dsn: process.env.E2E_TEST_DSN,
     environment: 'qa',
diff --git a/dev-packages/e2e-tests/test-applications/hono-4/src/routes.ts b/dev-packages/e2e-tests/test-applications/hono-4/src/routes.ts
index fbb273c7c425..a3272bc45ca3 100644
--- a/dev-packages/e2e-tests/test-applications/hono-4/src/routes.ts
+++ b/dev-packages/e2e-tests/test-applications/hono-4/src/routes.ts
@@ -1,7 +1,7 @@
 import type { Hono } from 'hono';
 import { HTTPException } from 'hono/http-exception';
 
-export function addRoutes(app: Hono<{ Bindings: { E2E_TEST_DSN: string } }>): void {
+export function addRoutes(app: Hono<{ Bindings?: { E2E_TEST_DSN: string } }>): void {
   app.get('/', c => {
     return c.text('Hello Hono!');
   });
diff --git a/packages/hono/src/bun/middleware.ts b/packages/hono/src/bun/middleware.ts
index cbca87ea6b9e..fbcbffb15019 100644
--- a/packages/hono/src/bun/middleware.ts
+++ b/packages/hono/src/bun/middleware.ts
@@ -9,7 +9,7 @@ export interface HonoBunOptions extends Options<BaseTransportOptions> {}
 /**
  * Sentry middleware for Hono running in a Bun runtime environment.
  */
-export const sentry = (app: Hono, options: HonoBunOptions | undefined = {}): MiddlewareHandler => {
+export const sentry = (app: Hono, options: HonoBunOptions): MiddlewareHandler => {
   const isDebug = options.debug;
 
   isDebug && debug.log('Initialized Sentry Hono middleware (Bun)');
diff --git a/packages/hono/src/node/middleware.ts b/packages/hono/src/node/middleware.ts
index 1dbca92d02e5..2a85575db0d8 100644
--- a/packages/hono/src/node/middleware.ts
+++ b/packages/hono/src/node/middleware.ts
@@ -9,7 +9,7 @@ export interface HonoNodeOptions extends Options<BaseTransportOptions> {}
 /**
  * Sentry middleware for Hono running in a Node runtime environment.
  */
-export const sentry = (app: Hono, options: HonoNodeOptions | undefined = {}): MiddlewareHandler => {
+export const sentry = (app: Hono, options: HonoNodeOptions): MiddlewareHandler => {
   const isDebug = options.debug;
 
   isDebug && debug.log('Initialized Sentry Hono middleware (Node)');