diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ec7a6c1769b..94eda080641 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,6 +63,7 @@ jobs:
 
       - name: Install Dependencies
         run: |
+          npm i -g bytes
           npm ci
           sudo apt-get install -y xclip ripgrep exuberant-ctags
           xclip -version
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1126bf30590..4cf684ac63c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -27,14 +27,13 @@ If this seems like a lot or you aren't able to do all this setup, you might also
 If you want to go the usual route and run the project locally, though:
 
 - [Install Node.js](https://nodejs.org/en/download/)
-- [Install Yarn](https://yarnpkg.com)
 - [Fork the project](https://guides.github.com/activities/forking/#fork)
 
 Then in your terminal:
 
 - Add coc.nvim to your vim's rtp by `set runtimepath^=/path/to/coc.nvim`
 - `cd path/to/your/coc.nvim`
-- `yarn install`
+- `npm install`
 - Install [coc-tsserver](https://github.com/neoclide/coc-tsserver) by
   `:CocInstall coc-tsserver` in your vim
 - Install [coc-eslint](https://github.com/neoclide/coc-eslint) by
@@ -72,10 +71,10 @@ To contribute code:
 - [Set up the project](#project-setup).
 - Make any necessary changes to the source code.
 - Include any [additional documentation](#contribute-documentation) the changes might need.
-- Make sure the code doesn't have lint issue by command `yarn lint` in your
+- Make sure the code doesn't have lint issue by command `npm run lint` in your
   terminal.
 - Write tests that verify that your contribution works as expected when necessary.
-- Make sure all tests passed by command `yarn jest` in your terminal.
+- Make sure all tests passed by command `npm test` in your terminal.
 - Write clear, concise commit message(s) using [conventional-changelog format](https://github.com/conventional-changelog/conventional-changelog-angular/blob/master/convention.md).
 - Dependency updates, additions, or removals must be in individual commits, and the message must use the format: `<prefix>(deps): PKG@VERSION`, where `<prefix>` is any of the usual `conventional-changelog` prefixes, at your discretion.
 - Go to https://github.com/neoclide/coc.nvim/pulls and open a new pull request with your changes.
diff --git a/doc/coc-api.txt b/doc/coc-api.txt
index f40f6a14c6d..bb55f305fa2 100644
--- a/doc/coc-api.txt
+++ b/doc/coc-api.txt
@@ -332,7 +332,7 @@ To manually create an extension, follow these step:
 Recommended steps:
 
   • Install types of NodeJS and coc.nvim by terminal command
-    `yarn install @types/node@16.18 coc.nvim` in extension folder.
+    `npm install @types/node@16.18 coc.nvim` in extension folder.
   • Bundle the javascript files when using multiple node dependencies by
     esbuild to save the time of installation.  A typical build script looks
     like:
diff --git a/doc/coc.txt b/doc/coc.txt
index 3451689fcff..276f56120cb 100644
--- a/doc/coc.txt
+++ b/doc/coc.txt
@@ -109,9 +109,6 @@ Neovim >= 0.4.0 or Vim >= 8.1.1719.
 
 NodeJS https://nodejs.org/ >= 16.18.0.
 
-Yarn https://yarnpkg.com/ required to build coc.nvim from typescript source
-code.
-
 ==============================================================================
 INSTALLATION						*coc-installation*
 
@@ -142,8 +139,8 @@ To use Vim's native |packages| on Linux or MaxOS, use script like: >
   curl --fail -L https://github.com/neoclide/coc.nvim/archive/release.tar.gz|tar xzfv -
   nvim -c 'helptags ~/.local/share/nvim/site/pack/coc/start|q'
 
-when using source code of coc.nvim, you'll have to install
-https://yarnpkg.com/ and run `yarn install` in project root of coc.nvim.
+when using source code of coc.nvim, you'll have to run `npm install` in project
+root of coc.nvim.
 
 ==============================================================================
 EXTENSIONS						*coc-extensions*
@@ -165,7 +162,7 @@ See |coc-api-extension| for the guide to create coc.nvim extension.
 Install extensions from git (not recommended):~
 
   • Download the source code.
-  • In project root, install dependencies and compile the code by `yarn install`
+  • In project root, install dependencies and compile the code by `npm install`
     (needed by most coc extensions).
   • Add the project root to vim's runtimepath by `set runtimepath^=/path/to/project`