diff --git a/data/copyright.html b/data/copyright.html
index ca19e63279..32b479ade9 100644
--- a/data/copyright.html
+++ b/data/copyright.html
@@ -308,6 +308,9 @@
 
   <li><a href="https://www.onlinewebfonts.com/icon" title="OnlineWebFonts">OnlineWebFonts</a><br>
     &copy; 2023 OnlineWebFonts.com <a href="#cc-by-4" class="license">CC BY 4.0 License</a></li>
+
+  <li><a href="https://github.com/enzet/Roentgen">Röntgen</a><br>
+    &copy; 2023 Sergey Vartanov <a href="#cc-by-4" class="license">CC BY 4.0 License</a></li>
 </ul>
 </div>