diff --git a/package.json b/package.json
index ae41be04..d722ff42 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,9 @@
     "build:oauth-providers": "yarn workspace @hono/oauth-providers build",
     "build": "run-p 'build:*'",
     "lint": "eslint 'packages/**/*.{ts,tsx}'",
-    "lint:fix": "eslint --fix 'packages/**/*.{ts,tsx}'"
+    "lint:fix": "eslint --fix 'packages/**/*.{ts,tsx}'",
+    "format": "prettier --check 'packages/**/*.{ts,tsx}'",
+    "format:fix": "prettier --write 'packages/**/*.{ts,tsx}'"
   },
   "license": "MIT",
   "private": true,
@@ -59,4 +61,4 @@
     "typescript": "^5.2.2"
   },
   "packageManager": "yarn@4.0.2"
-}
+}
\ No newline at end of file
diff --git a/packages/oauth-providers/src/providers/github/githubAuth.ts b/packages/oauth-providers/src/providers/github/githubAuth.ts
index 665da022..8d864c76 100644
--- a/packages/oauth-providers/src/providers/github/githubAuth.ts
+++ b/packages/oauth-providers/src/providers/github/githubAuth.ts
@@ -44,7 +44,9 @@ export function githubAuth(options: {
       // OAuth apps can't have multiple callback URLs, but GitHub Apps can.
       // As such, we want to make sure we call back to the same location
       // for GitHub apps and not the first configured callbackURL in the app config.
-      return c.redirect(auth.redirect().concat(options.oauthApp ? '' : `&redirect_uri=${c.req.url}`))
+      return c.redirect(
+        auth.redirect().concat(options.oauthApp ? '' : `&redirect_uri=${c.req.url}`)
+      )
     }
 
     // Retrieve user data from github
diff --git a/packages/swagger-ui/test/option-renderer.test.ts b/packages/swagger-ui/test/option-renderer.test.ts
index 0d2541b3..50175152 100644
--- a/packages/swagger-ui/test/option-renderer.test.ts
+++ b/packages/swagger-ui/test/option-renderer.test.ts
@@ -6,7 +6,7 @@ describe('SwaggerUIOption Rendering', () => {
       renderSwaggerUIOptions({
         configUrl: 'https://petstore3.swagger.io/api/v3/openapi.json',
       })
-    ).toEqual('configUrl: \'https://petstore3.swagger.io/api/v3/openapi.json\'')
+    ).toEqual("configUrl: 'https://petstore3.swagger.io/api/v3/openapi.json'")
   })
 
   it('renders correctly with presets', () => {
@@ -59,7 +59,7 @@ describe('SwaggerUIOption Rendering', () => {
       renderSwaggerUIOptions({
         url: 'https://petstore3.swagger.io/api/v3/openapi.json',
       })
-    ).toEqual('url: \'https://petstore3.swagger.io/api/v3/openapi.json\'')
+    ).toEqual("url: 'https://petstore3.swagger.io/api/v3/openapi.json'")
   })
 
   it('renders correctly with urls', () => {
@@ -82,7 +82,7 @@ describe('SwaggerUIOption Rendering', () => {
       renderSwaggerUIOptions({
         layout: 'StandaloneLayout',
       })
-    ).toEqual('layout: \'StandaloneLayout\'')
+    ).toEqual("layout: 'StandaloneLayout'")
   })
 
   it('renders correctly with docExpansion', () => {
@@ -90,7 +90,7 @@ describe('SwaggerUIOption Rendering', () => {
       renderSwaggerUIOptions({
         docExpansion: 'list',
       })
-    ).toEqual('docExpansion: \'list\'')
+    ).toEqual("docExpansion: 'list'")
   })
 
   it('renders correctly with maxDisplayedTags', () => {
diff --git a/packages/zod-openapi/test/index.test-d.ts b/packages/zod-openapi/test/index.test-d.ts
index d8cd0071..ed8c20e8 100644
--- a/packages/zod-openapi/test/index.test-d.ts
+++ b/packages/zod-openapi/test/index.test-d.ts
@@ -75,28 +75,36 @@ describe('Types', () => {
 
 describe('Input types', () => {
   const ParamsSchema = z.object({
-    id: z.string().transform(Number).openapi({
-      param: {
-        name: 'id',
-        in: 'path',
-      },
-      example: 123,
-    }),
+    id: z
+      .string()
+      .transform(Number)
+      .openapi({
+        param: {
+          name: 'id',
+          in: 'path',
+        },
+        example: 123,
+      }),
   })
 
   const QuerySchema = z.object({
-    age: z.string().transform(Number).openapi({
-      param: {
-        name: 'age',
-        in: 'query',
-      },
-      example: 42
-    }),
+    age: z
+      .string()
+      .transform(Number)
+      .openapi({
+        param: {
+          name: 'age',
+          in: 'query',
+        },
+        example: 42,
+      }),
   })
 
-  const BodySchema = z.object({
-    sex: z.enum(['male', 'female']).openapi({})
-  }).openapi('User')
+  const BodySchema = z
+    .object({
+      sex: z.enum(['male', 'female']).openapi({}),
+    })
+    .openapi('User')
 
   const UserSchema = z
     .object({
@@ -111,7 +119,7 @@ describe('Input types', () => {
       }),
       sex: z.enum(['male', 'female']).openapi({
         example: 'male',
-      })
+      }),
     })
     .openapi('User')
 
@@ -141,7 +149,6 @@ describe('Input types', () => {
     },
   })
 
-
   it('Should return correct types', () => {
     const app = new OpenAPIHono()
 
diff --git a/packages/zod-validator/src/index.ts b/packages/zod-validator/src/index.ts
index 08fe64bf..32eab9b9 100644
--- a/packages/zod-validator/src/index.ts
+++ b/packages/zod-validator/src/index.ts
@@ -17,15 +17,11 @@ export const zValidator = <
   I = z.input<T>,
   O = z.output<T>,
   V extends {
-    in: HasUndefined<I> extends true
-      ? { [K in Target]?: I }
-      : { [K in Target]: I };
-    out: { [K in Target]: O };
+    in: HasUndefined<I> extends true ? { [K in Target]?: I } : { [K in Target]: I }
+    out: { [K in Target]: O }
   } = {
-    in: HasUndefined<I> extends true
-      ? { [K in Target]?: I }
-      : { [K in Target]: I };
-    out: { [K in Target]: O };
+    in: HasUndefined<I> extends true ? { [K in Target]?: I } : { [K in Target]: I }
+    out: { [K in Target]: O }
   }
 >(
   target: Target,