From c5ca2dc60b245da362cbe55017699457ad6a241c Mon Sep 17 00:00:00 2001
From: blueloveTH <blueloveTH@foxmail.com>
Date: Sun, 6 Aug 2023 15:43:33 +0800
Subject: [PATCH] ...

---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index b9211f30..55211380 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,10 @@ Check our [Coding Style Guide](https://pocketpy.dev/coding_style_guide/) if you
 
   An excellent learning material. It illustrates how Python's virtual machine works.
 
++ [box2d](https://box2d.org/)
+
+  The world's best 2D physics engine, written by Erin Catto. `box2d` now becomes a built-in module in pkpy `v1.1.3` and later.
+
 
 ## License