diff --git a/.all-contributorsrc b/.all-contributorsrc
index 8d9026820..0087c240e 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -291,6 +291,15 @@
         "code"
       ]
     },
+    {
+      "login": "valdar-hu",
+      "name": "Krisztián Nagy",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/17962817?v=4",
+      "profile": "https://github.com/valdar-hu",
+      "contributions": [
+        "code"
+      ]
+    },
     {
       "login": "vanogrid",
       "name": "Alexander Ivanov",
diff --git a/README.md b/README.md
index 13a649741..4f2b4895c 100644
--- a/README.md
+++ b/README.md
@@ -189,6 +189,7 @@ This project is licensed under the terms of the MIT license.
     <td align="center"><a href="https://www.vanogrid.com"><img src="https://avatars0.githubusercontent.com/u/4307918?v=4" width="100px;" alt=""/><br /><sub><b>Alexander Ivanov</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=vanogrid" title="Code">💻</a></td>
   </tr>
   <tr>
+    <td align="center"><a href="https://github.com/valdar-hu"><img src="https://avatars3.githubusercontent.com/u/17962817?v=4" width="100px;" alt=""/><br /><sub><b>Krisztián Nagy</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=valdar-hu" title="Code">💻</a></td>
   </tr>
   <tr>
   </tr>