From ca77c9a53c6c89861e26cd8682b43417329c4a8f Mon Sep 17 00:00:00 2001
From: SnailClimb <koushuangbwcx@163.com>
Date: Tue, 4 Dec 2018 11:36:57 +0800
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 README.md | 2 +-
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diff --git a/README.md b/README.md
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 ### 程序员的数学课
 
-![程序员的数学课](http://my-blog-to-use.oss-cn-beijing.aliyuncs.com/18-12-4/71245138.jpg)
+![程序员的数学课](http://my-blog-to-use.oss-cn-beijing.aliyuncs.com/18-12-4/56085913.jpg)
 
 ### 公众号