diff --git a/docs/notes/Java 容器.md b/docs/notes/Java 容器.md
index 22193941..eeb5d16a 100644
--- a/docs/notes/Java 容器.md	
+++ b/docs/notes/Java 容器.md	
@@ -391,7 +391,7 @@ transient Node<E> first;
 transient Node<E> last;
 ```
 
-<div align="center"> <img src="https://gitee.com/CyC2018/CS-Notes/raw/master/docs/pics/a79aec4f-aea4-4ee2-87e3-7c7c6049b90c_200.png" width="400px"> </div><br>
+<div align="center"> <img src="https://gitee.com/CyC2018/CS-Notes/raw/master/docs/pics/a79aec4f-aea4-4ee2-87e3-7c7c6049b90c_200.png" width="450px"> </div><br>
 
 ### 2. 与 ArrayList 的比较
 
diff --git a/docs/notes/数据库系统原理.md b/docs/notes/数据库系统原理.md
index 73aba7b8..cdf1d97c 100644
--- a/docs/notes/数据库系统原理.md
+++ b/docs/notes/数据库系统原理.md
@@ -47,7 +47,7 @@
 
 事务指的是满足 ACID 特性的一组操作，可以通过 Commit 提交一个事务，也可以使用 Rollback 进行回滚。
 
-<div align="center"> <img src="https://gitee.com/CyC2018/CS-Notes/raw/master/docs/pics/731a5e8f-a2c2-43ff-b8dd-6aeb9fffbe26.jpg"/> </div><br>
+<div align="center"> <img src="https://gitee.com/CyC2018/CS-Notes/raw/master/docs/pics/731a5e8f-a2c2-43ff-b8dd-6aeb9fffbe26.jpg" width="400px"> </div><br>
 
 ## ACID
 
@@ -80,7 +80,7 @@
 - 在并发的情况下，多个事务并行执行，事务不仅要满足原子性，还需要满足隔离性，才能满足一致性。
 - 事务满足持久化是为了能应对数据库崩溃的情况。
 
-<div align="center"> <img src="https://gitee.com/CyC2018/CS-Notes/raw/master/docs/pics/8036ba3d-8de9-44aa-bf5d-1f8ca18ae89b.jpg" width="700"/> </div><br>
+<div align="center"> <img src="https://gitee.com/CyC2018/CS-Notes/raw/master/docs/pics/de2740c2-c1b5-413d-b6d5-9680d3485c02_200.png" width="450px"> </div><br>
 
 ## AUTOCOMMIT
 
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