diff --git a/.all-contributorsrc b/.all-contributorsrc
index ca442aa6e..94158246d 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -291,6 +291,15 @@
         "code"
       ]
     },
+    {
+      "login": "waisuan",
+      "name": "Evan Sia Wai Suan",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/10975700?v=4",
+      "profile": "https://github.com/waisuan",
+      "contributions": [
+        "code"
+      ]
+    },
     {
       "login": "AnaghaSasikumar",
       "name": "AnaghaSasikumar",
diff --git a/README.md b/README.md
index 508a1dbef..6a091ea20 100644
--- a/README.md
+++ b/README.md
@@ -154,6 +154,7 @@ This project is licensed under the terms of the MIT license.
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/AnaghaSasikumar"><img src="https://avatars2.githubusercontent.com/u/42939261?v=4" width="100px;" alt=""/><br /><sub><b>AnaghaSasikumar</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=AnaghaSasikumar" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/waisuan"><img src="https://avatars2.githubusercontent.com/u/10975700?v=4" width="100px;" alt=""/><br /><sub><b>Evan Sia Wai Suan</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=waisuan" title="Code">💻</a></td>
   </tr>
 </table>