diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 520a7c8c1..9b431ea54 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -14,10 +14,10 @@ Install pnpm: `npm install -g pnpm`
 
 Set the Electron mirror environment variable and install Electron:
 
-* macOS/Linux: `ELECTRON_MIRROR=https://cnpmjs.org/mirrors/electron/ pnpm install electron@21.4.2 -D`
+* macOS/Linux: `ELECTRON_MIRROR=https://cnpmjs.org/mirrors/electron/ pnpm install electron@21.4.4 -D`
 * Windows:
     * `SET ELECTRON_MIRROR=https://cnpmjs.org/mirrors/electron/`
-    * `pnpm install electron@21.4.2 -D`
+    * `pnpm install electron@21.4.4 -D`
 
 NPM mirror:
 
@@ -28,7 +28,7 @@ NPM mirror:
 
 On the desktop, go to the app folder to run:
 
-* `pnpm install electron@21.4.2 -D`
+* `pnpm install electron@21.4.4 -D`
 * `pnpm run dev`
 * `pnpm run start`
 
diff --git a/.github/CONTRIBUTING_zh_CN.md b/.github/CONTRIBUTING_zh_CN.md
index 5d947a9a0..da0b826a0 100644
--- a/.github/CONTRIBUTING_zh_CN.md
+++ b/.github/CONTRIBUTING_zh_CN.md
@@ -16,11 +16,11 @@
 
 * macOS/Linux: 
  ```
- ELECTRON_MIRROR=https://cnpmjs.org/mirrors/electron/ pnpm install electron@21.4.2 -D
+ ELECTRON_MIRROR=https://cnpmjs.org/mirrors/electron/ pnpm install electron@21.4.4 -D
  ```
 * Windows:
     * `SET ELECTRON_MIRROR=https://cnpmjs.org/mirrors/electron/`
-    * `pnpm install electron@21.4.2 -D`
+    * `pnpm install electron@21.4.4 -D`
 
 NPM 镜像：
 
@@ -30,7 +30,7 @@ NPM 镜像：
 
 桌面端进入 app 文件夹运行：
 
-* `pnpm install electron@21.4.2 -D`
+* `pnpm install electron@21.4.4 -D`
 * `pnpm run dev`
 * `pnpm run start`
 
diff --git a/app/appearance/README.md b/app/appearance/README.md
deleted file mode 100644
index 42a1499d1..000000000
--- a/app/appearance/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# 思源笔记外观 <a title="Hits" target="_blank" href="https://github.com/siyuan-note/appearance"><img src="https://hits.b3log.org/siyuan-note/appearance.svg"></a>
-
-[English](https://github.com/siyuan-note/appearance/blob/master/README_en_US.md)
-
-* emojis：Emoji 表情
-* langs：多语言配置
-* themes：主题
-* icons：图标
diff --git a/app/appearance/README_en_US.md b/app/appearance/README_en_US.md
deleted file mode 100644
index 7a80ae7fa..000000000
--- a/app/appearance/README_en_US.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# SiYuan appearance <a title="Hits" target="_blank" href="https://github.com/siyuan-note/appearance"><img src="https://hits.b3log.org/siyuan-note/appearance.svg"></a>
-
-[中文](https://github.com/siyuan-note/appearance/blob/master/README.md)
-
-* emojis: Emoji assets
-* langs: Multi-language configuration
-* themes: Appearance themes
-* icons: Appearance icons
diff --git a/app/package.json b/app/package.json
index d15752227..22641108f 100644
--- a/app/package.json
+++ b/app/package.json
@@ -53,7 +53,7 @@
     "clean-webpack-plugin": "^4.0.0",
     "css-loader": "^6.7.1",
     "dayjs": "^1.11.5",
-    "electron": "21.4.2",
+    "electron": "21.4.4",
     "electron-builder": "^23.6.0",
     "encoding": "^0.1.13",
     "esbuild-loader": "^3.0.1",
diff --git a/app/pnpm-lock.yaml b/app/pnpm-lock.yaml
index 5f385fb85..f68eeb906 100644
--- a/app/pnpm-lock.yaml
+++ b/app/pnpm-lock.yaml
@@ -3,7 +3,7 @@ lockfileVersion: '6.0'
 dependencies:
   '@electron/remote':
     specifier: ^2.0.9
-    version: 2.0.9(electron@21.4.2)
+    version: 2.0.9(electron@21.4.4)
   electron-fetch:
     specifier: ^1.7.4
     version: 1.7.4
@@ -31,8 +31,8 @@ devDependencies:
     specifier: ^1.11.5
     version: 1.11.5
   electron:
-    specifier: 21.4.2
-    version: 21.4.2
+    specifier: 21.4.4
+    version: 21.4.4
   electron-builder:
     specifier: ^23.6.0
     version: 23.6.0
@@ -121,12 +121,12 @@ packages:
     transitivePeerDependencies:
       - supports-color
 
-  /@electron/remote@2.0.9(electron@21.4.2):
+  /@electron/remote@2.0.9(electron@21.4.4):
     resolution: {integrity: sha512-LR0W0ID6WAKHaSs0x5LX9aiG+5pFBNAJL6eQAJfGkCuZPUa6nZz+czZLdlTDETG45CgF/0raSvCtYOYUpr6c+A==}
     peerDependencies:
       electron: '>= 13.0.0'
     dependencies:
-      electron: 21.4.2
+      electron: 21.4.4
     dev: false
 
   /@electron/universal@1.2.1:
@@ -1675,8 +1675,8 @@ packages:
     resolution: {integrity: sha512-YoVeFrGd/7ROjz4R9uPoND1K/hSRC/xADy9639ZmIZeJSaBnKdYx3I6LMPsY7CXLpK7JFgKQVzeZ/dk2br6Eaw==}
     dev: true
 
-  /electron@21.4.2:
-    resolution: {integrity: sha512-AM2MbPUB7el/9O1UXL3xYA8pTDOPDxiT0HrLuXKkX8Oe0yCvjozNRzEac27gIUd1V/hg0BBvQuYjaRU1Rcxhyg==}
+  /electron@21.4.4:
+    resolution: {integrity: sha512-N5O7y7Gtt7mDgkJLkW49ETiT8M3myZ9tNIEvGTKhpBduX4WdgMj6c3hYeYBD6XW7SvbRkWEQaTl25RNday8Xpw==}
     engines: {node: '>= 10.17.0'}
     hasBin: true
     requiresBuild: true