diff --git a/.changeset/modern-sheep-unite.md b/.changeset/modern-sheep-unite.md
new file mode 100644
index 00000000..bd395106
--- /dev/null
+++ b/.changeset/modern-sheep-unite.md
@@ -0,0 +1,5 @@
+---
+'@hono/zod-openapi': patch
+---
+
+fix: handle `Conflicting names for parameter`
diff --git a/packages/bun-transpiler/package.json b/packages/bun-transpiler/package.json
index 89ce6cf3..c13a720a 100644
--- a/packages/bun-transpiler/package.json
+++ b/packages/bun-transpiler/package.json
@@ -40,4 +40,4 @@
     "tsup": "^8.0.1",
     "vitest": "^1.0.4"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/zod-openapi/src/index.ts b/packages/zod-openapi/src/index.ts
index 63a9fc19..8b6cd248 100644
--- a/packages/zod-openapi/src/index.ts
+++ b/packages/zod-openapi/src/index.ts
@@ -321,8 +321,12 @@ export class OpenAPIHono<
   ): OpenAPIHono<E, S & ToSchema<'get', P, {}, {}>, BasePath> => {
     return this.get(path, (c) => {
       const config = typeof configure === 'function' ? configure(c) : configure
-      const document = this.getOpenAPIDocument(config)
-      return c.json(document)
+      try {
+        const document = this.getOpenAPIDocument(config)
+        return c.json(document)
+      } catch (e) {
+        return c.json(e, 500)
+      }
     }) as any
   }
 
@@ -332,8 +336,12 @@ export class OpenAPIHono<
   ): OpenAPIHono<E, S & ToSchema<'get', P, {}, {}>, BasePath> => {
     return this.get(path, (c) => {
       const config = typeof configure === 'function' ? configure(c) : configure
-      const document = this.getOpenAPI31Document(config)
-      return c.json(document)
+      try {
+        const document = this.getOpenAPI31Document(config)
+        return c.json(document)
+      } catch (e) {
+        return c.json(e, 500)
+      }
     }) as any
   }
 
diff --git a/packages/zod-openapi/test/index.test.ts b/packages/zod-openapi/test/index.test.ts
index e3c08148..ac4b8388 100644
--- a/packages/zod-openapi/test/index.test.ts
+++ b/packages/zod-openapi/test/index.test.ts
@@ -1274,3 +1274,71 @@ describe('Named params in nested routes', () => {
     expect(Object.keys(data['paths'])[0]).toBe('/root/{rootId}/sub/{subId}')
   })
 })
+
+describe('Handle "Conflicting names for parameter"', () => {
+  const app = new OpenAPIHono()
+  app.openapi(
+    createRoute({
+      method: 'get',
+      path: '/posts/{foo}', // should be `id`
+      request: {
+        params: z.object({
+          id: z.string().openapi({
+            param: {
+              name: 'foo',
+              in: 'path',
+            },
+          }),
+        }),
+      },
+      responses: {
+        200: {
+          description: 'response',
+        },
+      },
+    }),
+    (c) => c.text('foo')
+  )
+
+  app.doc('/doc', () => ({
+    openapi: '3.0.0',
+    info: {
+      version: '1.0.0',
+      title: 'my API',
+    },
+  }))
+
+  app.doc31('/doc31', () => ({
+    openapi: '3.1.0',
+    info: {
+      version: '1.0.0',
+      title: 'my API',
+    },
+  }))
+
+  it('Should return a 500 response correctly - /doc', async () => {
+    const res = await app.request('/doc')
+    expect(res.status).toBe(500)
+    const data = await res.json()
+    expect(data).toEqual({
+      data: {
+        key: 'name',
+        values: ['id', 'foo'],
+      },
+      message: 'Conflicting names for parameter',
+    })
+  })
+
+  it('Should return a 500 response correctly - /doc31', async () => {
+    const res = await app.request('/doc31')
+    expect(res.status).toBe(500)
+    const data = await res.json()
+    expect(data).toEqual({
+      data: {
+        key: 'name',
+        values: ['id', 'foo'],
+      },
+      message: 'Conflicting names for parameter',
+    })
+  })
+})
diff --git a/packages/zod-validator/package.json b/packages/zod-validator/package.json
index f926ac7e..094e0b22 100644
--- a/packages/zod-validator/package.json
+++ b/packages/zod-validator/package.json
@@ -34,6 +34,7 @@
     "hono": "^3.11.7",
     "jest": "^29.7.0",
     "rimraf": "^5.0.5",
+    "typescript": "^5.3.3",
     "zod": "3.19.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index f6c05bbf..050aee35 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1694,6 +1694,7 @@ __metadata:
     hono: "npm:^3.11.7"
     jest: "npm:^29.7.0"
     rimraf: "npm:^5.0.5"
+    typescript: "npm:^5.3.3"
     zod: "npm:3.19.1"
   peerDependencies:
     hono: ">=3.9.0"