diff --git a/.all-contributorsrc b/.all-contributorsrc
index a93738b..fc2a07c 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -33,6 +33,16 @@
         "mentoring"
       ]
     },
+    {
+      "login": "Robaina",
+      "name": "Semidán Robaina",
+      "avatar_url": "https://avatars.githubusercontent.com/u/21340147?v=4",
+      "profile": "https://www.linkedin.com/in/semidan-robaina/",
+      "contributions": [
+        "review",
+        "ideas"
+      ]
+    },
     {
       "login": "Batalex",
       "name": "Alex Batisse",
diff --git a/README.md b/README.md
index 11927fb..d4ec891 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@
 [![DOI](https://zenodo.org/badge/614836750.svg)](https://zenodo.org/badge/latestdoi/614836750)
 <br>
 <!-- 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-4-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 
@@ -122,6 +122,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/katoss"><img src="https://avatars.githubusercontent.com/u/23122159?v=4?s=100" width="100px;" alt="Katharina Kloppenborg"/><br /><sub><b>Katharina Kloppenborg</b></sub></a><br /><a href="https://github.com/katoss/cardsort/commits?author=katoss" title="Code">💻</a> <a href="#ideas-katoss" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/katoss/cardsort/commits?author=katoss" title="Documentation">📖</a> <a href="#design-katoss" title="Design">🎨</a> <a href="#projectManagement-katoss" title="Project Management">📆</a> <a href="#research-katoss" title="Research">🔬</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://tzovar.as"><img src="https://avatars.githubusercontent.com/u/674899?v=4?s=100" width="100px;" alt="Bastian Greshake Tzovaras"/><br /><sub><b>Bastian Greshake Tzovaras</b></sub></a><br /><a href="#fundingFinding-gedankenstuecke" title="Funding Finding">🔍</a> <a href="https://github.com/katoss/cardsort/commits?author=gedankenstuecke" title="Code">💻</a> <a href="#ideas-gedankenstuecke" title="Ideas, Planning, & Feedback">🤔</a> <a href="#mentoring-gedankenstuecke" title="Mentoring">🧑‍🏫</a></td>
       <td align="center" valign="top" width="14.28%"><a href="http://batalex.github.io"><img src="https://avatars.githubusercontent.com/u/11004857?v=4?s=100" width="100px;" alt="Alex Batisse"/><br /><sub><b>Alex Batisse</b></sub></a><br /><a href="https://github.com/katoss/cardsort/pulls?q=is%3Apr+reviewed-by%3ABatalex" title="Reviewed Pull Requests">👀</a> <a href="#ideas-Batalex" title="Ideas, Planning, & Feedback">🤔</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://www.linkedin.com/in/semidan-robaina/"><img src="https://avatars.githubusercontent.com/u/21340147?v=4?s=100" width="100px;" alt="Semidán Robaina"/><br /><sub><b>Semidán Robaina</b></sub></a><br /><a href="https://github.com/katoss/cardsort/pulls?q=is%3Apr+reviewed-by%3ARobaina" title="Reviewed Pull Requests">👀</a> <a href="#ideas-Robaina" title="Ideas, Planning, & Feedback">🤔</a></td>
     </tr>
   </tbody>
 </table>