diff --git a/.all-contributorsrc b/.all-contributorsrc
index db77997..e121094 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -26,6 +26,15 @@
         "code",
         "doc"
       ]
+    },
+    {
+      "login": "yolophg",
+      "name": "Helena Park",
+      "avatar_url": "https://avatars.githubusercontent.com/u/38199103?v=4",
+      "profile": "http://helenapark.site",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "files": [
diff --git a/README.md b/README.md
index 76d442d..5fd10c0 100644
--- a/README.md
+++ b/README.md
@@ -14,8 +14,9 @@
 <table>
   <tbody>
     <tr>
-      <td align="center" valign="top" width="14.28%"><a href="https://github.com/DaleSeo"><img src="https://avatars.githubusercontent.com/u/5466341?v=4?s=100" width="100px;" alt="Dale Seo"/><br /><sub><b>Dale Seo</b></sub></a><br /><a href="https://github.com/DaleStudy/survey/commits?author=DaleSeo" title="Code">💻</a> <a href="#design-DaleSeo" title="Design">🎨</a> <a href="https://github.com/DaleStudy/survey/commits?author=DaleSeo" title="Documentation">📖</a> <a href="#research-DaleSeo" title="Research">🔬</a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://kwonnayeon.github.io"><img src="https://avatars.githubusercontent.com/u/53819606?v=4?s=100" width="100px;" alt="Nayeon (Anna)"/><br /><sub><b>Nayeon (Anna)</b></sub></a><br /><a href="https://github.com/DaleStudy/survey/commits?author=KwonNayeon" title="Code">💻</a> <a href="https://github.com/DaleStudy/survey/commits?author=KwonNayeon" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/DaleSeo"><img src="https://avatars.githubusercontent.com/u/5466341?v=4&size=100" width="100px" height="100px" alt="Dale Seo"/><br /><sub><b>Dale Seo</b></sub></a><br /><a href="https://github.com/DaleStudy/survey/commits?author=DaleSeo" title="Code">💻</a> <a href="#design-DaleSeo" title="Design">🎨</a> <a href="https://github.com/DaleStudy/survey/commits?author=DaleSeo" title="Documentation">📖</a> <a href="#research-DaleSeo" title="Research">🔬</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://kwonnayeon.github.io"><img src="https://avatars.githubusercontent.com/u/53819606?v=4&size=100" width="100px" height="100px" alt="Nayeon (Anna)"/><br /><sub><b>Nayeon (Anna)</b></sub></a><br /><a href="https://github.com/DaleStudy/survey/commits?author=KwonNayeon" title="Code">💻</a> <a href="https://github.com/DaleStudy/survey/commits?author=KwonNayeon" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://helenapark.site"><img src="https://avatars.githubusercontent.com/u/38199103?v=4&size=100" width="100px" height="100px" alt="Helena Park"/><br /><sub><b>Helena Park</b></sub></a><br /><a href="https://github.com/DaleStudy/survey/commits?author=yolophg" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>