diff --git a/docs/.vitepress/config.mts b/docs/.vitepress/config.mts
index b90a51c..a40b163 100644
--- a/docs/.vitepress/config.mts
+++ b/docs/.vitepress/config.mts
@@ -49,6 +49,10 @@ export default defineConfig({
         icon: "x",
         link: "https://x.com/KawamataRyo",
       },
+      {
+        icon: "kofi",
+        link: "https://ko-fi.com/kawamataryo",
+      },
     ],
 
     outline: {