diff --git a/.github/workflows/test.yml b/.github/workflows/ci.yml
similarity index 99%
rename from .github/workflows/test.yml
rename to .github/workflows/ci.yml
index a0c02e2..8819d7b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,4 @@
-name: Test
+name: CI
 
 on:
   push:
diff --git a/README.md b/README.md
index 57efcc3..2f3a4b3 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,12 @@
+[![GitHub tag](https://img.shields.io/github/v/tag/xsh-lib/shadowsocks?sort=date)](https://github.com/xsh-lib/shadowsocks/tags)
+[![GitHub](https://img.shields.io/github/license/xsh-lib/shadowsocks.svg?style=flat-square)](https://github.com/xsh-lib/shadowsocks/)
+[![GitHub last commit](https://img.shields.io/github/last-commit/xsh-lib/shadowsocks.svg?style=flat-square)](https://github.com/xsh-lib/shadowsocks/commits/main)
+
+[![CI](https://github.com/xsh-lib/shadowsocks/actions/workflows/ci.yml/badge.svg)](https://github.com/xsh-lib/shadowsocks/actions/workflows/ci.yml)
+[![CodeFactor](https://www.codefactor.io/repository/github/xsh-lib/shadowsocks/badge)](https://www.codefactor.io/repository/github/xsh-lib/shadowsocks)
+[![GitHub issues](https://img.shields.io/github/issues/xsh-lib/shadowsocks.svg?style=flat-square)](https://github.com/xsh-lib/shadowsocks/issues)
+[![GitHub pull requests](https://img.shields.io/github/issues-pr/xsh-lib/shadowsocks.svg?style=flat-square)](https://github.com/xsh-lib/shadowsocks/pulls)
+
 # xsh-lib/shadowsocks
 
 xsh Library - Shadowsocks toolkit.
@@ -6,15 +15,18 @@ About xsh and its libraries, check out [xsh document](https://github.com/alexzha
 
 ## Requirements
 
-1. bash or zsh
+`xsh-lib/shadowsocks` is tested in CI ([GitHub Actions](https://github.com/xsh-lib/shadowsocks/actions/workflows/ci.yml)) on every push and pull request, across the following shell/OS combinations:
 
-    Tested with bash:
-    * 4.3.48 on Linux
-    * 3.2.57 on macOS
+| Shell | Version | OS                    | Tested |
+|-------|---------|-----------------------|:------:|
+| bash  | 3.2     | macOS                 | ✅     |
+| bash  | 4.4     | Linux (rockylinux:8)  | ✅     |
+| bash  | 5.x     | Linux (ubuntu-latest) | ✅     |
+| bash  | 5.x     | macOS (Homebrew)      | ✅     |
+| zsh   | 5.x     | Linux (ubuntu-latest) | ✅     |
+| zsh   | 5.x     | macOS                 | ✅     |
 
-    The utilities also run under **zsh** (the default shell on modern macOS);
-    xsh executes them under zsh's ksh emulation. Tested with zsh 5.x.
-    Requires xsh >= 0.7.0 for zsh.
+zsh utilities run under xsh's ksh emulation and require **xsh ≥ 0.7.0**.
 
 ## Dependency