diff --git a/CHANGELOG.md b/CHANGELOG.md
index d24b8b9..1853951 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+## [1.1.1] - 2024-11-24
+
+### Fixed
+- **指定模型**
+  - 修复因错误的UUID映射导致的 gemini-3-pro-image-preview 模型触发HTTP500的 BUG
+
 
 ## [1.1.0] - 2024-11-24
 
diff --git a/lib/lmarena.js b/lib/lmarena.js
index e65e28b..ca87ef8 100644
--- a/lib/lmarena.js
+++ b/lib/lmarena.js
@@ -405,6 +405,7 @@ async function initBrowser(config) {
 async function generateImage(context, prompt, imgPaths, modelId) {
     const { page, client, width, height } = context;
     const textareaSelector = 'textarea';
+    let requestHandler = null;
 
     try {
         // 1. 强制开启新会话 (通过URL跳转)
@@ -427,33 +428,34 @@ async function generateImage(context, prompt, imgPaths, modelId) {
         await humanType(page, textareaSelector, prompt);
         await sleep(800, 1500);
 
-        // --- 注入 Fetch 拦截器 ---
+        // --- 注入 Fetch 拦截器 (Puppeteer Request Interception) ---
         if (modelId) {
-            await page.evaluate((targetModelId) => {
-                const originalFetch = window.fetch;
-                window.fetch = async (...args) => {
-                    let [resource, config] = args;
-                    // 简单判断 URL
-                    const url = resource instanceof Request ? resource.url : resource.toString();
-
-                    if (url.includes('/nextjs-api/stream/') && config && config.method === 'POST' && config.body) {
-                        try {
-                            const data = JSON.parse(config.body);
+            await page.setRequestInterception(true);
+            requestHandler = async (request) => {
+                const url = request.url();
+                if (url.includes('/nextjs-api/stream/') && request.method() === 'POST') {
+                    try {
+                        const postData = request.postData();
+                        if (postData) {
+                            const data = JSON.parse(postData);
                             console.log(`[Browser] 正在拦截请求。原始 modelAId: ${data.modelAId}`);
 
                             // 修改 modelAId
-                            data.modelAId = targetModelId;
-                            config.body = JSON.stringify(data);
+                            data.modelAId = modelId;
+                            const newPostData = JSON.stringify(data);
 
                             console.log(`[Browser] 请求已修改。新 modelAId: ${data.modelAId}`);
-                        } catch (e) {
-                            console.error('[Browser] 拦截失败:', e);
+                            await request.continue({ postData: newPostData });
+                            return;
                         }
+                    } catch (e) {
+                        console.error('[Browser] 拦截修改失败:', e);
                     }
-                    return originalFetch.apply(window, args);
-                };
-            }, modelId);
-            console.log(`>>> [Test] 已注入 Fetch 拦截器，目标模型: ${modelId}`);
+                }
+                await request.continue();
+            };
+            page.on('request', requestHandler);
+            console.log(`>>> [Test] 已启用请求拦截，目标模型: ${modelId}`);
         }
 
         // 4. 发送
@@ -520,6 +522,13 @@ async function generateImage(context, prompt, imgPaths, modelId) {
     } catch (err) {
         console.error('>>> [Error] 生成任务失败:', err.message);
         return { error: err.message };
+    } finally {
+        if (requestHandler) {
+            page.off('request', requestHandler);
+            try {
+                await page.setRequestInterception(false);
+            } catch (e) { }
+        }
     }
 }
 
diff --git a/lib/models.js b/lib/models.js
index 03832c9..f019215 100644
--- a/lib/models.js
+++ b/lib/models.js
@@ -1,5 +1,5 @@
 export const MODEL_MAPPING = {
-    "gemini-3-pro-image-preview": "019aa208-5c19-7162-ae3b-0a9ddbble16a",
+    "gemini-3-pro-image-preview": "019aa208-5c19-7162-ae3b-0a9ddbb1e16a",
     "seedream-4-high-res-fal": "32974d8d-333c-4d2e-abf3-f258c0ac1310",
     "hunyuan-image-3.0": "7766a45c-1b6b-4fb8-9823-2557291e1ddd",
     "gemini-2.5-flash-image-preview": "0199ef2a-583f-7088-b704-b75fd169401d",