diff --git a/.all-contributorsrc b/.all-contributorsrc
index 84be041c3..13b9e738f 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -308,6 +308,17 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "yamacent",
+      "name": "Daisuke Yamamoto",
+      "avatar_url": "https://avatars.githubusercontent.com/u/8544439?v=4",
+      "profile": "https://github.com/yamacent",
+      "contributions": [
+        "code",
+        "bug",
+        "test"
+      ]
     }
   ],
   "contributorsPerLine": 7,
diff --git a/README.md b/README.md
index ec4be2fd8..6d551f3f7 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![codecov](https://codecov.io/gh/drwpow/openapi-typescript/branch/master/graph/badge.svg)](https://codecov.io/gh/drwpow/openapi-typescript)
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-29-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-30-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 # 📘️ openapi-typescript
@@ -206,6 +206,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/FedeBev"><img src="https://avatars.githubusercontent.com/u/22151395?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Federico Bevione</b></sub></a><br /><a href="https://github.com/drwpow/openapi-typescript/issues?q=author%3AFedeBev" title="Bug reports">🐛</a> <a href="https://github.com/drwpow/openapi-typescript/commits?author=FedeBev" title="Code">💻</a> <a href="https://github.com/drwpow/openapi-typescript/commits?author=FedeBev" title="Tests">⚠️</a></td>
+    <td align="center"><a href="https://github.com/yamacent"><img src="https://avatars.githubusercontent.com/u/8544439?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Daisuke Yamamoto</b></sub></a><br /><a href="https://github.com/drwpow/openapi-typescript/commits?author=yamacent" title="Code">💻</a> <a href="https://github.com/drwpow/openapi-typescript/issues?q=author%3Ayamacent" title="Bug reports">🐛</a> <a href="https://github.com/drwpow/openapi-typescript/commits?author=yamacent" title="Tests">⚠️</a></td>
   </tr>
 </table>