diff --git a/index.md b/index.md
index 09dae7cdd..c72fae83b 100644
--- a/index.md
+++ b/index.md
@@ -17,12 +17,12 @@ hide:
 
 <p align="center">
   <a href="https://github.com/krahets/hello-algo">
-    <img src="index.assets/btn_download_code_light.png#only-light" width="150">
-    <img src="index.assets/btn_download_code_dark.png#only-dark" width="150">
+    <img src="index.assets/btn_download_code_light.png#only-light" width="140">
+    <img src="index.assets/btn_download_code_dark.png#only-dark" width="140">
   </a>
   <a href="https://github.com/krahets/hello-algo/releases">
-    <img src="index.assets/btn_download_pdf_light.png#only-light" width="150">
-    <img src="index.assets/btn_download_pdf_dark.png#only-dark" width="150">
+    <img src="index.assets/btn_download_pdf_light.png#only-light" width="140">
+    <img src="index.assets/btn_download_pdf_dark.png#only-dark" width="140">
   </a>
 </p>