diff --git a/X10D/src/Numerics/RandomExtensions.cs b/X10D/src/Numerics/RandomExtensions.cs
index ebe0187..b89a5e2 100644
--- a/X10D/src/Numerics/RandomExtensions.cs
+++ b/X10D/src/Numerics/RandomExtensions.cs
@@ -1,4 +1,5 @@
 using System.Numerics;
+using X10D.Core;
 
 namespace X10D.Numerics;
 
diff --git a/X10D/src/StringExtensions/StringExtensions.cs b/X10D/src/StringExtensions/StringExtensions.cs
index 6273969..1a20a2d 100644
--- a/X10D/src/StringExtensions/StringExtensions.cs
+++ b/X10D/src/StringExtensions/StringExtensions.cs
@@ -1,4 +1,5 @@
 using System.Text;
+using X10D.Core;
 
 namespace X10D;