diff --git a/.all-contributorsrc b/.all-contributorsrc
index 52d0095..d9a2f79 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -9,6 +9,16 @@
   "imageSize": 100,
   "commit": true,
   "commitConvention": "none",
-  "contributors": [],
+  "contributors": [
+    {
+      "login": "yudai",
+      "name": "Iwasaki Yudai",
+      "avatar_url": "https://avatars.githubusercontent.com/u/33192?v=4",
+      "profile": "https://yudai.arielworks.com/",
+      "contributions": [
+        "code"
+      ]
+    }
+  ],
   "contributorsPerLine": 7
 }
diff --git a/README.md b/README.md
index b1be6ed..b68f243 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # ![](https://raw.githubusercontent.com/sorenisanerd/gotty/master/resources/favicon.ico) GoTTY - Share your terminal as a web application
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-0-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 [![GitHub release](http://img.shields.io/github/release/sorenisanerd/gotty.svg?style=flat-square)][release]
@@ -202,8 +202,15 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore-start -->
 <!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://yudai.arielworks.com/"><img src="https://avatars.githubusercontent.com/u/33192?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Iwasaki Yudai</b></sub></a><br /><a href="https://github.com/sorenisanerd/gotty/commits?author=yudai" title="Code">💻</a></td>
+  </tr>
+</table>
+
 <!-- markdownlint-restore -->
 <!-- prettier-ignore-end -->
+
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!
\ No newline at end of file