diff --git a/.all-contributorsrc b/.all-contributorsrc
index 1dcef61..a69fb48 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -1,35 +1,44 @@
 {
-    "files": [
-        "README.md"
-    ],
-    "imageSize": 100,
-    "commit": false,
-    "commitType": "docs",
-    "commitConvention": "angular",
-    "contributors": [
-        {
-            "login": "AtomScott",
-            "name": "Atom Scott",
-            "avatar_url": "https://avatars.githubusercontent.com/u/22371492?v=4",
-            "profile": "https://atomscott.me/",
-            "contributions": [
-                "maintenance"
-            ]
-        },
-        {
-            "login": "IkumaUchida",
-            "name": "Ikuma Uchida",
-            "avatar_url": "https://avatars.githubusercontent.com/u/48281753?v=4",
-            "profile": "https://github.com/IkumaUchida",
-            "contributions": [
-                "tutorial"
-            ]
-        }
-    ],
-    "contributorsPerLine": 7,
-    "skipCi": true,
-    "repoType": "github",
-    "repoHost": "https://github.com",
-    "projectName": "SportsLabKit",
-    "projectOwner": "AtomScott"
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "commitType": "docs",
+  "commitConvention": "angular",
+  "contributors": [
+    {
+      "login": "AtomScott",
+      "name": "Atom Scott",
+      "avatar_url": "https://avatars.githubusercontent.com/u/22371492?v=4",
+      "profile": "https://atomscott.me/",
+      "contributions": [
+        "maintenance"
+      ]
+    },
+    {
+      "login": "IkumaUchida",
+      "name": "Ikuma Uchida",
+      "avatar_url": "https://avatars.githubusercontent.com/u/48281753?v=4",
+      "profile": "https://github.com/IkumaUchida",
+      "contributions": [
+        "tutorial"
+      ]
+    },
+    {
+      "login": "shunsuke-iwashita",
+      "name": "shunsuke-iwashita",
+      "avatar_url": "https://avatars.githubusercontent.com/u/129936839?v=4",
+      "profile": "https://github.com/shunsuke-iwashita",
+      "contributions": [
+        "bug"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7,
+  "skipCi": true,
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "projectName": "SportsLabKit",
+  "projectOwner": "AtomScott"
 }
diff --git a/README.md b/README.md
index 2f8e069..aa7043f 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ See the [Contributing Guide](./contributing.md) for more information.
 ## Contributors
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
@@ -108,6 +108,7 @@ See the [Contributing Guide](./contributing.md) for more information.
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://atomscott.me/"><img src="https://avatars.githubusercontent.com/u/22371492?v=4?s=100" width="100px;" alt="Atom Scott"/><br /><sub><b>Atom Scott</b></sub></a><br /><a href="#maintenance-AtomScott" title="Maintenance">🚧</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/IkumaUchida"><img src="https://avatars.githubusercontent.com/u/48281753?v=4?s=100" width="100px;" alt="Ikuma Uchida"/><br /><sub><b>Ikuma Uchida</b></sub></a><br /><a href="#tutorial-IkumaUchida" title="Tutorials">✅</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/shunsuke-iwashita"><img src="https://avatars.githubusercontent.com/u/129936839?v=4?s=100" width="100px;" alt="shunsuke-iwashita"/><br /><sub><b>shunsuke-iwashita</b></sub></a><br /><a href="https://github.com/AtomScott/SportsLabKit/issues?q=author%3Ashunsuke-iwashita" title="Bug reports">🐛</a></td>
     </tr>
   </tbody>
 </table>