diff --git a/README.en.md b/README.en.md
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--- a/README.en.md
+++ b/README.en.md
@@ -6,7 +6,7 @@
 
 A simple and user-friendly Spine file viewer and exporter.
 
-![previewer](img/preview.jpg)
+![previewer](img/preview.webp)
 
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diff --git a/README.md b/README.md
index 7ddc836..bb65e83 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 
 一个简单好用的 Spine 文件查看&导出程序.
 
-![previewer](img/preview.jpg)
+![previewer](img/preview.webp)
 
 ---
 
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diff --git a/img/preview.webp b/img/preview.webp
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