diff --git a/README.md b/README.md
index 5913056..1462553 100644
--- a/README.md
+++ b/README.md
@@ -4,20 +4,20 @@
 ## 文件结构
 ---
 ```
-.
 ├── coc-settings.json
 ├── init.lua
 ├── lua
 │   ├── core
-│   │   ├── G.lua
 │   │   ├── keymap.lua
 │   │   ├── options.lua
 │   │   └── plug.lua
 │   ├── Filetype
 │   │   ├── c.lua
 │   │   └── markdown.lua
+│   ├── G.lua
 │   └── Plugin
 │       ├── coc.lua
+│       ├── Imchange.lua
 │       └── lualine.lua
 └── README.md
 ```
@@ -60,26 +60,3 @@ select the closest text object.
 
 ## Markdow-preview
 下载后需要到插件目录下使用`npm install`或者`yarn install`
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diff --git a/lua/Filetype/markdown.lua b/lua/Filetype/markdown.lua
index 8431359..6ce616a 100644
--- a/lua/Filetype/markdown.lua
+++ b/lua/Filetype/markdown.lua
@@ -1,6 +1,6 @@
 local G = require("G")
 
-G.cmd("au VimEnter * :MarkdownPreview")
+G.cmd("au VimEnter * :MarkdownPreviewToggle")
 
 --set to 1, nvim will open the preview window after entering the markdown buffer
 --default: 0