diff --git a/Readme.md b/Readme.md
index 9892aee..b5a186e 100644
--- a/Readme.md
+++ b/Readme.md
@@ -9,6 +9,8 @@ Most of the code is from `typescript-language-features` extension which is bundl
 `typescript.tsx`. In coc.nvim, these filetypes are mapped to `javascriptreact`
 and `typescriptreact` because that's what tsserver uses.
 
+**Note** for javascript project, make sure you have [jsconfig.json](https://code.visualstudio.com/docs/languages/jsconfig)
+
 ## Install
 
 In your vim/neovim, run command: