diff --git a/.all-contributorsrc b/.all-contributorsrc
index 68800f50f0..b629839afd 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -465,6 +465,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "ariostas",
+      "name": "Andres Rios Tascon",
+      "avatar_url": "https://avatars.githubusercontent.com/u/7596837?v=4",
+      "profile": "http://www.ariostas.com",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,
diff --git a/README.md b/README.md
index dd5d38399f..53faad33df 100644
--- a/README.md
+++ b/README.md
@@ -228,6 +228,7 @@ Thanks especially to the gracious help of Awkward Array contributors (including
     </tr>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/pfackeldey"><img src="https://avatars.githubusercontent.com/u/18463582?v=4?s=100" width="100px;" alt="Peter Fackeldey"/><br /><sub><b>Peter Fackeldey</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward/commits?author=pfackeldey" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://www.ariostas.com"><img src="https://avatars.githubusercontent.com/u/7596837?v=4?s=100" width="100px;" alt="Andres Rios Tascon"/><br /><sub><b>Andres Rios Tascon</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward/commits?author=ariostas" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>