diff --git a/ch03.md b/ch03.md
index c48ea97..5cf9e6a 100644
--- a/ch03.md
+++ b/ch03.md
@@ -7,7 +7,7 @@ Bitcoin是一个开源项目，源代码使用开放（MIT）授权，可免费
 
 下图为Bitcoin Core的架构。
 
-![图3-1](https://github.com/bitcoinbook/bitcoinbook/raw/develop/images/mbc2_0301.png)
+![图3-1](https://github.com/bitcoinbook/bitcoinbook/raw/second_edition_print3/images/mbc2_0301.png)
 
 图3-1 比特币核心架构（来源：Eric Lombrozo）