diff --git a/.claude/skills/version-upgrade/SKILL.md b/.claude/skills/version-upgrade/SKILL.md
new file mode 100644
index 00000000..ecd88be4
--- /dev/null
+++ b/.claude/skills/version-upgrade/SKILL.md
@@ -0,0 +1,54 @@
+---
+name: version-upgrade
+description: 升级项目版本号。当用户要求升级版本、更新版本号、发布新版本时使用此 skill。支持 major（主版本）、minor（次版本）、patch（补丁版本）三种升级方式。
+---
+
+# Version Upgrade
+
+升级 cloudflare_temp_email 项目版本号。
+
+## 需要修改的文件
+
+1. `frontend/package.json` - version 字段
+2. `worker/package.json` - version 字段
+3. `worker/src/constants.ts` - VERSION 常量（格式：`VERSION: 'v' + '1.4.0'`）
+4. `pages/package.json` - version 字段
+5. `vitepress-docs/package.json` - version 字段
+6. `CHANGELOG.md` - 添加新版本占位符
+7. `CHANGELOG_EN.md` - 添加新版本占位符（英文）
+
+## 版本升级流程
+
+1. 读取 `frontend/package.json` 获取当前版本号
+2. 根据升级类型计算新版本号：
+   - major: 1.3.0 → 2.0.0
+   - minor: 1.3.0 → 1.4.0
+   - patch: 1.3.0 → 1.3.1
+3. 更新所有 package.json 文件中的 version 字段
+4. 在 CHANGELOG.md 顶部添加新版本占位符
+5. 在 CHANGELOG_EN.md 顶部添加新版本占位符
+
+## CHANGELOG 格式
+
+中文 (CHANGELOG.md) - 在 `## v{OLD_VERSION}(main)` 之前插入：
+```markdown
+## v{VERSION}(main)
+
+### Features
+
+### Bug Fixes
+
+### Improvements
+
+```
+
+英文 (CHANGELOG_EN.md) - 同样格式。
+
+## 提交信息格式
+
+```
+feat: upgrade version to v{VERSION}
+
+- Update version number to {VERSION} in all package.json files
+- Add v{VERSION} placeholder in CHANGELOG.md
+```
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a7c6e6c9..3ec3d0a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,15 @@
   <a href="CHANGELOG_EN.md">🇺🇸 English</a>
 </p>
 
-## v1.3.0(main)
+## v1.4.0(main)
+
+### Features
+
+### Bug Fixes
+
+### Improvements
+
+## v1.3.0
 
 ### Features
 
diff --git a/CHANGELOG_EN.md b/CHANGELOG_EN.md
index 50fe8e15..a4d84f2a 100644
--- a/CHANGELOG_EN.md
+++ b/CHANGELOG_EN.md
@@ -6,7 +6,15 @@
   <a href="CHANGELOG_EN.md">🇺🇸 English</a>
 </p>
 
-## v1.3.0(main)
+## v1.4.0(main)
+
+### Features
+
+### Bug Fixes
+
+### Improvements
+
+## v1.3.0
 
 ### Features
 
diff --git a/frontend/package.json b/frontend/package.json
index a6be7eae..fb5426d4 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cloudflare_temp_email",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "private": true,
   "type": "module",
   "scripts": {
diff --git a/pages/package.json b/pages/package.json
index 60834711..28880f3e 100644
--- a/pages/package.json
+++ b/pages/package.json
@@ -1,6 +1,6 @@
 {
   "name": "temp-email-pages",
-  "version": "1.2.1",
+  "version": "1.4.0",
   "description": "",
   "main": "index.js",
   "scripts": {
diff --git a/vitepress-docs/package.json b/vitepress-docs/package.json
index b6793023..944bbbe2 100644
--- a/vitepress-docs/package.json
+++ b/vitepress-docs/package.json
@@ -1,7 +1,7 @@
 {
   "name": "temp-mail-docs",
   "private": true,
-  "version": "1.2.1",
+  "version": "1.4.0",
   "type": "module",
   "devDependencies": {
     "@types/node": "^25.1.0",
diff --git a/worker/package.json b/worker/package.json
index 1f8673ec..de38cd6c 100644
--- a/worker/package.json
+++ b/worker/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cloudflare_temp_email",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "private": true,
   "type": "module",
   "scripts": {
diff --git a/worker/src/constants.ts b/worker/src/constants.ts
index 753fbf52..5670e4b7 100644
--- a/worker/src/constants.ts
+++ b/worker/src/constants.ts
@@ -1,5 +1,5 @@
 export const CONSTANTS = {
-    VERSION: 'v' + '1.1.0',
+    VERSION: 'v' + '1.4.0',
 
     // DB Version
     DB_VERSION_KEY: 'db_version',