diff --git a/README.md b/README.md
index a8f27b1..92c5a49 100644
--- a/README.md
+++ b/README.md
@@ -15,11 +15,11 @@
 
 YouTuBe：
 
-<a href="https://www.youtube.com/watch?v=rTiA-OwAVTs" title=""><img width = "640" height = "480"  src="https://res.cloudinary.com/marcomontalbano/image/upload/v1680856711/video_to_markdown/images/youtube--rTiA-OwAVTs-c05b58ac6eb4c4700831b2b3070cd403.jpg" alt="" /></a>
+<a href="https://www.youtube.com/watch?v=rTiA-OwAVTs" title=""><img width = "320" height = "240"  src="https://res.cloudinary.com/marcomontalbano/image/upload/v1680856711/video_to_markdown/images/youtube--rTiA-OwAVTs-c05b58ac6eb4c4700831b2b3070cd403.jpg" alt="" /></a>
 
 Bilibili:
 
-<a href="https://www.bilibili.com/video/BV1dc411L7eZ/" title=""><img width = "640" height = "480"  src="http://i1.hdslb.com/bfs/archive/2e49f2ff60765db2d2948bff37c9bc2926e6600a.jpg" alt="" /></a>
+<a href="https://www.bilibili.com/video/BV1dc411L7eZ/" title=""><img width = "320" height = "240"  src="http://i1.hdslb.com/bfs/archive/2e49f2ff60765db2d2948bff37c9bc2926e6600a.jpg" alt="" /></a>
 
 ### 使用前提 ###