diff --git a/src/Octokit.Webhooks/Models/AppEvent.cs b/src/Octokit.Webhooks/Models/AppEvent.cs
index b5a601eb..708b68e5 100644
--- a/src/Octokit.Webhooks/Models/AppEvent.cs
+++ b/src/Octokit.Webhooks/Models/AppEvent.cs
@@ -50,6 +50,8 @@ public enum AppEvent
     Member,
     [EnumMember(Value = "membership")]
     Membership,
+    [EnumMember(Value = "merge_group")]
+    MergeGroup,
     [EnumMember(Value = "meta")]
     Meta,
     [EnumMember(Value = "milestone")]