diff --git a/src/ReC.Domain/Constants/ResultType.cs b/src/ReC.Domain/Constants/ResultType.cs
index e55bdbd..db3abd1 100644
--- a/src/ReC.Domain/Constants/ResultType.cs
+++ b/src/ReC.Domain/Constants/ResultType.cs
@@ -1,6 +1,6 @@
 namespace ReC.Domain.Constants;
 
-public enum ResultType
+public enum ResultType : byte
 {
     Pre = 1,
     Main,