diff --git a/src/ReC.Domain/Constants/EndpointAuthType.cs b/src/ReC.Domain/Constants/EndpointAuthType.cs
index 3a4e416..463401d 100644
--- a/src/ReC.Domain/Constants/EndpointAuthType.cs
+++ b/src/ReC.Domain/Constants/EndpointAuthType.cs
@@ -1,6 +1,6 @@
 namespace ReC.Domain.Constants;
 
-public enum EndpointAuthType
+public enum EndpointAuthType : byte
 {
     NoAuth = 0,
     ApiKey = 1,