diff --git a/notes/Hadoop-MapReduce.md b/notes/Hadoop-MapReduce.md
index 2163a09a..e55c62d4 100644
--- a/notes/Hadoop-MapReduce.md
+++ b/notes/Hadoop-MapReduce.md
@@ -149,7 +149,7 @@ public class WordCountMapper extends Mapper<LongWritable, Text, Text, IntWritabl
 
 
 
-`WordCountMapper` 继承自 `Mappe` 类，这是一个泛型类，定义如下：
+`WordCountMapper` 继承自 `Mapper` 类，这是一个泛型类，定义如下：
 
 ```java
 WordCountMapper extends Mapper<LongWritable, Text, Text, IntWritable>
@@ -384,4 +384,4 @@ job.setNumReduceTasks(WordCountDataUtils.WORD_LIST.size());
 
 
 
-<div align="center"> <img  src="https://gitee.com/heibaiying/BigData-Notes/raw/master/pictures/weixin-desc.png"/> </div>
\ No newline at end of file
+<div align="center"> <img  src="https://gitee.com/heibaiying/BigData-Notes/raw/master/pictures/weixin-desc.png"/> </div>