diff --git a/server.js b/server.js
index 236403a..0edecd4 100644
--- a/server.js
+++ b/server.js
@@ -882,7 +882,7 @@ app.get('/api/health', (req, res) => {
     res.json({
         status: 'ok',
         service: 'data-chart-tool',
-        version: '1.8.0',
+        version: '1.9.0',
         endpoints: {
             'POST /api/chart': '生成图表图片（JSON body）',
             'GET /api/chart': '生成图表图片（URL 参数）',
@@ -897,7 +897,7 @@ app.get('/api/health', (req, res) => {
 app.get('/api/docs', (req, res) => {
     res.json({
         name: '数据可视化图表生成器 API',
-        version: '1.8.0',
+        version: '1.9.0',
         endpoints: [
             {
                 method: 'POST',