diff --git a/Day13.cs b/Day13.cs
index 7005b1b..c17de9b 100644
--- a/Day13.cs
+++ b/Day13.cs
@@ -1,7 +1,7 @@
 #define Day13
-using System.Text.RegularExpressions;
-using System.Threading.Channels;
 #if Day13
+using System.Text.RegularExpressions;
+
 var text = File.ReadAllText("day13/input").Split("\n\n");
 var points = text[0].Split("\n").Select(l => l.Split(","))
     .Select(p => new Point(int.Parse(p[0]), int.Parse(p[1]))).ToHashSet();