diff --git a/X10D.Tests/src/Numerics/Vector2Tests.cs b/X10D.Tests/src/Numerics/Vector2Tests.cs
index e2e5a7b..25389b7 100644
--- a/X10D.Tests/src/Numerics/Vector2Tests.cs
+++ b/X10D.Tests/src/Numerics/Vector2Tests.cs
@@ -1,6 +1,5 @@
 using System.Numerics;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using X10D.Core;
 using X10D.Drawing;
 using X10D.Numerics;
 
diff --git a/X10D/src/Core/SpanExtensions.cs b/X10D/src/Core/SpanExtensions.cs
index 672fdab..3d6133d 100644
--- a/X10D/src/Core/SpanExtensions.cs
+++ b/X10D/src/Core/SpanExtensions.cs
@@ -1,10 +1,9 @@
-using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Contracts;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 #if NETCOREAPP3_0_OR_GREATER
-using X10D.Core;
 using System.Runtime.Intrinsics;
 using System.Runtime.Intrinsics.X86;
 using System.Runtime.Intrinsics.Arm;