diff --git a/.changeset/strange-pumas-tickle.md b/.changeset/strange-pumas-tickle.md
new file mode 100644
index 00000000..17ab2cb8
--- /dev/null
+++ b/.changeset/strange-pumas-tickle.md
@@ -0,0 +1,5 @@
+---
+'@hono/zod-openapi': patch
+---
+
+fix: bump up Hono version
diff --git a/packages/zod-openapi/package.json b/packages/zod-openapi/package.json
index 0f424b2f..dd3a4ab2 100644
--- a/packages/zod-openapi/package.json
+++ b/packages/zod-openapi/package.json
@@ -31,14 +31,14 @@
     "zod": "3.*"
   },
   "devDependencies": {
-    "hono": "^3.4.3",
+    "hono": "^3.5.4",
     "zod": "^3.22.1"
   },
   "dependencies": {
     "@asteasolutions/zod-to-openapi": "^5.5.0",
-    "@hono/zod-validator": "^0.1.7"
+    "@hono/zod-validator": "^0.1.8"
   },
   "engines": {
     "node": ">=16.0.0"
   }
-}
+}
\ No newline at end of file
diff --git a/packages/zod-openapi/src/index.ts b/packages/zod-openapi/src/index.ts
index 3570772a..bfc1de50 100644
--- a/packages/zod-openapi/src/index.ts
+++ b/packages/zod-openapi/src/index.ts
@@ -11,8 +11,16 @@ import { extendZodWithOpenApi } from '@asteasolutions/zod-to-openapi'
 import type { OpenAPIObjectConfig } from '@asteasolutions/zod-to-openapi/dist/v3.0/openapi-generator'
 import { zValidator } from '@hono/zod-validator'
 import { Hono } from 'hono'
-import type { Context, Input, Schema, TypedResponse } from 'hono'
-import type { Env, Handler, MiddlewareHandler } from 'hono'
+import type {
+  Context,
+  Env,
+  Handler,
+  Input,
+  MiddlewareHandler,
+  Schema,
+  ToSchema,
+  TypedResponse,
+} from 'hono'
 import type { AnyZodObject, ZodSchema, ZodError } from 'zod'
 import { z, ZodType } from 'zod'
 
@@ -133,11 +141,11 @@ type ConvertPathType<T extends string> = T extends `${infer _}/{${infer Param}}$
   ? `/:${Param}`
   : T
 
-export class OpenAPIHono<E extends Env = Env, S = {}, BasePath extends string = '/'> extends Hono<
-  E,
-  S,
-  BasePath
-> {
+export class OpenAPIHono<
+  E extends Env = Env,
+  S extends Schema = {},
+  BasePath extends string = '/'
+> extends Hono<E, S, BasePath> {
   #registry: OpenAPIRegistry
 
   constructor() {
@@ -153,7 +161,7 @@ export class OpenAPIHono<E extends Env = Env, S = {}, BasePath extends string =
     route: R,
     handler: Handler<E, P, I, OutputType<R>>,
     hook?: Hook<I, E, P, OutputType<R>>
-  ): Hono<E, Schema<R['method'], P, I['in'], OutputType<R>>, BasePath> => {
+  ): Hono<E, ToSchema<R['method'], P, I['in'], OutputType<R>>, BasePath> => {
     this.#registry.registerPath(route)
 
     const validators: MiddlewareHandler[] = []
diff --git a/packages/zod-openapi/test/index.test.ts b/packages/zod-openapi/test/index.test.ts
index b3c0539f..91cecd80 100644
--- a/packages/zod-openapi/test/index.test.ts
+++ b/packages/zod-openapi/test/index.test.ts
@@ -1,9 +1,7 @@
 /* eslint-disable node/no-extraneous-import */
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import type { Env } from 'hono'
-import type { Hono } from 'hono'
+import type { Hono, Env, ToSchema } from 'hono'
 import { describe, it, expect, expectTypeOf } from 'vitest'
-import type { Schema } from 'zod'
 import { OpenAPIHono, createRoute, z } from '../src'
 
 describe('Basic - params', () => {
@@ -435,22 +433,20 @@ describe('Types', () => {
   it('Should return correct types', () => {
     type H = Hono<
       Env,
-      Schema<{
-        '/posts': {
-          $post: {
-            input: {
-              json: {
-                title: string
-                id: number
-              }
-            }
-            output: {
-              id: number
-              message: string
-            }
+      ToSchema<
+        'post',
+        '/posts',
+        {
+          json: {
+            title: string
+            id: number
           }
+        },
+        {
+          id: number
+          message: string
         }
-      }>,
+      >,
       '/'
     >
     expectTypeOf(appRoutes).toMatchTypeOf<H>
diff --git a/yarn.lock b/yarn.lock
index 99e6b4c7..6ec8b8c9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5823,7 +5823,7 @@ hono@^3.0.0, hono@^3.0.3, hono@^3.1.0, hono@^3.1.2, hono@^3.2.6:
   resolved "https://registry.yarnpkg.com/hono/-/hono-3.2.6.tgz#b4927ed20b2edf165277f3e2b787a4e4948223f6"
   integrity sha512-jUf9SgkTW/H3Pd9oPwFgf3j05RXUbILWm96WlHll56t2Jkv8tVXyfLeBzYwdTzB7JE/hx+DWMXrVJ06UdfcKng==
 
-hono@^3.1.5, hono@^3.4.3:
+hono@^3.1.5:
   version "3.4.3"
   resolved "https://registry.yarnpkg.com/hono/-/hono-3.4.3.tgz#ab1db8777fa80341daf389979b7888da0786e3db"
   integrity sha512-HbVxZh9yC3hV25+mFjUaM65t7g8ia2mXbhAGmVHA0r8+guizTJq1Cg4f2SmB5+JrviG0vaqOnWJ9U3O05aikbA==
@@ -5838,6 +5838,11 @@ hono@^3.5.2:
   resolved "https://registry.yarnpkg.com/hono/-/hono-3.5.2.tgz#83776c4f076c40f59850105af835a6a5609b7d07"
   integrity sha512-HezADUIepgTpn+LSHNU2vZd4V2wcFDkObycShxhR37eXwQXgjev9FHsxBpDkvPqGQLn3YAPiC3GNVZVUsbcwFg==
 
+hono@^3.5.4:
+  version "3.5.4"
+  resolved "https://registry.yarnpkg.com/hono/-/hono-3.5.4.tgz#66057d4c1ee127faafa087168af6d569ab25f5e7"
+  integrity sha512-GrRBIJhZ+tG+8RtoyPQjvqPGwppERmayyTiPKano4egmpkJf1XiptESUYK5vKHICNaJksAKB9jzy1CmOdQENPA==
+
 hosted-git-info@^2.1.4:
   version "2.8.9"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.9.tgz#dffc0bf9a21c02209090f2aa69429e1414daf3f9"