diff --git a/BritishHorseRacingApi/Models/SexType.cs b/BritishHorseRacingApi/Models/SexType.cs
index 3b1173e..c6d9b61 100644
--- a/BritishHorseRacingApi/Models/SexType.cs
+++ b/BritishHorseRacingApi/Models/SexType.cs
@@ -1,4 +1,4 @@
 namespace BritishHorseRacingApi.Models
 {
-    public enum SexType { Filly, Gelding };
+    public enum SexType { Filly, Gelding, Colt, Mare, Stallion };
 }