diff --git a/README.md b/README.md
index 61a3acf1..f818911c 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@
 </p>
 
 ## Sponsor
-[![coding](https://raw.githubusercontent.com/jdneo/vscode-leetcode/master/docs/imgs/sponsor_coding.jpg)](https://e.coding.net/?utm_source=leetcode)
+[![coding](https://raw.githubusercontent.com/jdneo/vscode-leetcode/master/docs/imgs/sponsor_coding.png)](https://e.coding.net/?utm_source=leetcode)
 
 - [English Document](#Requirements)
 - [中文文档](https://github.com/jdneo/vscode-leetcode/blob/master/docs/README_zh-CN.md)
diff --git a/docs/README_zh-CN.md b/docs/README_zh-CN.md
index b91d4ad2..1673343f 100644
--- a/docs/README_zh-CN.md
+++ b/docs/README_zh-CN.md
@@ -21,7 +21,7 @@
 </p>
 
 ## 赞助
-[![coding](https://raw.githubusercontent.com/jdneo/vscode-leetcode/master/docs/imgs/sponsor_coding.jpg)](https://e.coding.net/?utm_source=leetcode)
+[![coding](https://raw.githubusercontent.com/jdneo/vscode-leetcode/master/docs/imgs/sponsor_coding.png)](https://e.coding.net/?utm_source=leetcode)
 
 - [English Document](#Requirements)
 - [中文文档](https://github.com/jdneo/vscode-leetcode/blob/master/docs/README_zh-CN.md)
diff --git a/docs/imgs/sponsor_coding.jpg b/docs/imgs/sponsor_coding.jpg
deleted file mode 100644
index e6ee2385..00000000
Binary files a/docs/imgs/sponsor_coding.jpg and /dev/null differ
diff --git a/docs/imgs/sponsor_coding.png b/docs/imgs/sponsor_coding.png
new file mode 100644
index 00000000..df7b7780
Binary files /dev/null and b/docs/imgs/sponsor_coding.png differ