diff --git a/.all-contributorsrc b/.all-contributorsrc
index 389749a0b7..a4da2ef2bf 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -2949,6 +2949,15 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "KouichiMatsuda",
+      "name": "MATSUDA, Kouichi",
+      "avatar_url": "https://avatars.githubusercontent.com/u/14014568?v=4",
+      "profile": "http://www.gakuin.otsuma.ac.jp/english/",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "repoType": "github",
diff --git a/README.md b/README.md
index 75763dd00a..297c444722 100644
--- a/README.md
+++ b/README.md
@@ -546,6 +546,7 @@ We recognize all types of contributions. This project follows the [all-contribut
     <td align="center"><a href="http://RandomSyntax.Net"><img src="https://avatars.githubusercontent.com/u/6419944?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Gareth Williams</b></sub></a><br /><a href="https://github.com/processing/p5.js/commits?author=Gaweph" title="Code">💻</a></td>
     <td align="center"><a href="https://bandism.net/"><img src="https://avatars.githubusercontent.com/u/22633385?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ikko Ashimine</b></sub></a><br /><a href="https://github.com/processing/p5.js/commits?author=eltociear" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/0xJonas"><img src="https://avatars.githubusercontent.com/u/24874041?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jonas Rinke</b></sub></a><br /><a href="https://github.com/processing/p5.js/issues?q=author%3A0xJonas" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="http://www.gakuin.otsuma.ac.jp/english/"><img src="https://avatars.githubusercontent.com/u/14014568?v=4?s=100" width="100px;" alt=""/><br /><sub><b>MATSUDA, Kouichi</b></sub></a><br /><a href="https://github.com/processing/p5.js/issues?q=author%3AKouichiMatsuda" title="Bug reports">🐛</a></td>
   </tr>
 </table>