diff --git a/Checksums/dotFionn.Checksum.Utils/Extensions.cs b/Checksums/dotFionn.Checksum.Utils/Extensions.cs
index ca622bf..9bcbf95 100644
--- a/Checksums/dotFionn.Checksum.Utils/Extensions.cs
+++ b/Checksums/dotFionn.Checksum.Utils/Extensions.cs
@@ -4,7 +4,7 @@ namespace dotFionn.Checksum.Utils
 {
     public static class Extensions
     {
-        public static int digitSum(this int inInt)
+        public static int DigitSum(this int inInt)
         {
             int digitSum = 0;
 
diff --git a/Checksums/test/Program.cs b/Checksums/test/Program.cs
index 6cf112a..50aa4ec 100644
--- a/Checksums/test/Program.cs
+++ b/Checksums/test/Program.cs
@@ -8,7 +8,7 @@ namespace test
         static void Main(string[] args)
         {
             Console.WriteLine("Hello World!");
-            Console.WriteLine(123.digitSum());
+            Console.WriteLine(123.DigitSum());
             
         }
     }