diff --git a/.travis.yml b/.travis.yml
index 4331a292..2483f6f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,10 +12,12 @@ install:
   - cd frontend
   - yarn
   - cd ../app
-  - ./win_install.bat
+  - ./win-install.bat
+  - cd ..
 
 script:
   - cd frontend
   - yarn run dist
   - cd ../app
-  - ./win_build.bat
+  - ./win-build.bat
+  - cd ..
diff --git a/README.md b/README.md
index cd9d4b98..e374dc14 100644
--- a/README.md
+++ b/README.md
@@ -126,9 +126,9 @@ yarn run serve
 REM Electron 端
 cd ../app
 REM 安装依赖
-win_install.bat
+win-install.bat
 REM 打包 打包前请在前端目录运行打包命令
-win_build.bat
+win-build.bat
 REM 开发
 yarn run start
 ```
diff --git a/app/.gitignore b/app/.gitignore
index add654d0..126a2371 100644
--- a/app/.gitignore
+++ b/app/.gitignore
@@ -2,3 +2,4 @@ node_modules
 dist
 vs
 out
+bin
diff --git a/app/bin/.gitattributes b/app/bin/.gitattributes
deleted file mode 100644
index 0406b4d5..00000000
--- a/app/bin/.gitattributes
+++ /dev/null
@@ -1,2 +0,0 @@
-*.exe filter=lfs diff=lfs merge=lfs -text
-pandoc filter=lfs diff=lfs merge=lfs -text
diff --git a/app/bin/pandoc/2.7.3/darwin/pandoc b/app/bin/pandoc/2.7.3/darwin/pandoc
deleted file mode 100644
index 16e9e5ae..00000000
--- a/app/bin/pandoc/2.7.3/darwin/pandoc
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e17fc39dac7d3d85f02e170b59572b459cfa1def0f31a846da205ced99e1b1c6
-size 60319532
diff --git a/app/bin/pandoc/2.7.3/linux/pandoc b/app/bin/pandoc/2.7.3/linux/pandoc
deleted file mode 100644
index 855369e9..00000000
--- a/app/bin/pandoc/2.7.3/linux/pandoc
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ad46dc1745dad0d4dbdb4fe14892534eca3a8507d35e33fd7eadc6d7fda05fea
-size 74689368
diff --git a/app/bin/pandoc/2.7.3/win32/pandoc.exe b/app/bin/pandoc/2.7.3/win32/pandoc.exe
deleted file mode 100644
index c9676e9b..00000000
--- a/app/bin/pandoc/2.7.3/win32/pandoc.exe
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:67f139c18f0386ffc00512c198f6e92729bcb4ef15fe3e4c0d7c5f6565361c07
-size 139522412
diff --git a/app/copy-assets.js b/app/copy-assets.js
new file mode 100644
index 00000000..214b4370
--- /dev/null
+++ b/app/copy-assets.js
@@ -0,0 +1,25 @@
+const os = require('os')
+const path = require('path')
+const fs = require('fs-extra')
+
+const platform = os.platform()
+
+const assetsPath = path.join(__dirname, 'dist/assets')
+try {
+  fs.unlinkSync(assetsPath)
+} catch {
+}
+
+fs.copySync(path.join(__dirname, 'src/assets'), assetsPath)
+
+if (platform === 'win32') {
+  const pandocFilePath = path.join(__dirname, 'dist/pandoc.exe')
+  if (!fs.existsSync(pandocFilePath)) {
+    fs.copySync(path.join(__dirname, 'bin/win32-pandoc-2.7.3.exe'), pandocFilePath)
+  }
+} else {
+  const pandocFilePath = path.join(__dirname, 'dist/pandoc')
+  if (!fs.existsSync(pandocFilePath)) {
+    fs.copySync(path.join(__dirname, `bin/${platform}-pandoc-2.7.3`), pandocFilePath)
+  }
+}
diff --git a/app/copy_assets.js b/app/copy_assets.js
deleted file mode 100644
index 5163672d..00000000
--- a/app/copy_assets.js
+++ /dev/null
@@ -1,18 +0,0 @@
-const os = require('os')
-const path = require('path')
-const fs = require('fs-extra')
-
-const platform = os.platform()
-
-try {
-  fs.unlinkSync(path.join(__dirname, 'dist/assets'))
-} catch (error) {
-}
-
-fs.copySync(path.join(__dirname, 'src/assets'), path.join(__dirname, 'dist/assets'))
-
-if (platform === 'win32') {
-  fs.copySync(path.join(__dirname, 'bin/pandoc/2.7.3/win32/pandoc.exe'), path.join(__dirname, 'dist/pandoc.exe'))
-} else {
-  fs.copySync(path.join(__dirname, `bin/pandoc/2.7.3/${platform}/pandoc`), path.join(__dirname, 'dist/pandoc'))
-}
diff --git a/app/download-pandoc.js b/app/download-pandoc.js
new file mode 100644
index 00000000..20f15fea
--- /dev/null
+++ b/app/download-pandoc.js
@@ -0,0 +1,17 @@
+const os = require('os')
+const fs = require('fs')
+const path = require('path')
+const request = require('request')
+
+const filename = os.platform() + '-' + 'pandoc-2.7.3' + (os.platform() === 'win32' ? '.exe' : '')
+const downloadUrl = 'https://github.com/purocean/yn/releases/download/v1.1/' + filename
+
+const dir = path.join(__dirname, './bin')
+if (!fs.existsSync(dir)) {
+  fs.mkdirSync(dir)
+}
+
+const filePath = path.join(dir, filename)
+
+console.log('Download pandoc', downloadUrl, filename, filePath)
+request(downloadUrl).pipe(fs.createWriteStream(filePath))
diff --git a/app/install.sh b/app/install.sh
index bf9f852a..6bed93a5 100644
--- a/app/install.sh
+++ b/app/install.sh
@@ -11,3 +11,5 @@ export npm_config_runtime=electron
 export npm_config_build_from_source=true
 # Install all dependencies, and store cache to ~/.electron-gyp.
 HOME=~/.electron-gyp yarn
+
+yarn run download-pandoc
diff --git a/app/package.json b/app/package.json
index cfa624dc..76b6d285 100644
--- a/app/package.json
+++ b/app/package.json
@@ -8,7 +8,8 @@
     "email": "purocean@outlook.com"
   },
   "scripts": {
-    "copy-assets": "node copy_assets.js",
+    "download-pandoc": "node download-pandoc.js",
+    "copy-assets": "node copy-assets.js",
     "build": "tsc && npm run copy-assets",
     "serve": "ts-node src/server/main.ts",
     "start": "npm run build && electron ./dist/app.js"
diff --git a/app/win_build.bat b/app/win-build.bat
similarity index 100%
rename from app/win_build.bat
rename to app/win-build.bat
diff --git a/app/win_install.bat b/app/win-install.bat
similarity index 90%
rename from app/win_install.bat
rename to app/win-install.bat
index cfd66ba3..f47903fb 100644
--- a/app/win_install.bat
+++ b/app/win-install.bat
@@ -6,4 +6,5 @@ set npm_config_runtime="electron"
 set npm_config_cache=~\.npm-electron
 REM npm i --registry=https://registry.npm.taobao.org
 yarn
+yarn run download-pandoc
 endlocal
diff --git a/frontend/copy_assets.js b/frontend/copy-assets.js
similarity index 100%
rename from frontend/copy_assets.js
rename to frontend/copy-assets.js
diff --git a/frontend/package.json b/frontend/package.json
index 23efadcb..4025b0e0 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "copy-assets": "node copy_assets.js",
+    "copy-assets": "node copy-assets.js",
     "serve": "vue-cli-service serve",
     "build": "vue-cli-service build",
     "lint": "vue-cli-service lint",