diff --git a/2020/12/Circle.cs b/2020/12/Circle.cs
index a57c357..413518f 100644
--- a/2020/12/Circle.cs
+++ b/2020/12/Circle.cs
@@ -1,7 +1,7 @@
 using System;
 using System.Drawing;
 
-namespace System.Drawing
+namespace RyzStudio.Drawing
 {
     public class Circle
     {