diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@
 ![image](https://github.com/maning0303/MNZXingCode/blob/master/screenshots/mn_zxing_screenshot_003.jpeg)
 
 #### 完全自定义遮罩层
-![image](https://github.com/maning0303/MNZXingCode/blob/master/screenshots/mn_zxing_screenshot_004.jpeg)
+![image](https://github.com/maning0303/MNZXingCode/blob/master/screenshots/mn_zxing_screenshot_004.jpg)
 
 #### 自定义Activity
 ![image](https://github.com/maning0303/MNZXingCode/blob/master/screenshots/mn_zxing_screenshot_005.jpg)
diff --git a/screenshots/mn_zxing_screenshot_004.jpeg b/screenshots/mn_zxing_screenshot_004.jpeg
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diff --git a/screenshots/mn_zxing_screenshot_004.jpg b/screenshots/mn_zxing_screenshot_004.jpg
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