diff --git a/README.md b/README.md
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 | 主页                                | 文字识别弹窗                             |
 |-----------------------------------|------------------------------------|
-| ![](screenshots/device/index.jpg) | ![](screenshots/device/dialog.jpg) |
+| ![](screenshots/device/index.png) | ![](screenshots/device/dialog.png) |
 
 使用说明
 
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