diff --git a/WowPacketParser/Enums/ClientVersionBuild.cs b/WowPacketParser/Enums/ClientVersionBuild.cs
index 4939493ac8..394f30c41a 100644
--- a/WowPacketParser/Enums/ClientVersionBuild.cs
+++ b/WowPacketParser/Enums/ClientVersionBuild.cs
@@ -1029,6 +1029,7 @@ public enum ClientVersionBuild
         V5_5_2_64133 = 64133, // live
         V5_5_2_64271 = 64271, // live
         V5_5_2_64481 = 64481, // live
+        V5_5_3_64857 = 64857, // live
 
         // Battle.net - should probably not mix this but oh well
         BattleNetV37165 = 37165,
diff --git a/WowPacketParser/Enums/Version/Opcodes.cs b/WowPacketParser/Enums/Version/Opcodes.cs
index 0afa63576f..589389a282 100644
--- a/WowPacketParser/Enums/Version/Opcodes.cs
+++ b/WowPacketParser/Enums/Version/Opcodes.cs
@@ -1201,6 +1201,7 @@ public static ClientVersionBuild GetOpcodeDefiningBuild(ClientVersionBuild build
                 case ClientVersionBuild.V5_5_2_64133:
                 case ClientVersionBuild.V5_5_2_64271:
                 case ClientVersionBuild.V5_5_2_64481:
+                case ClientVersionBuild.V5_5_3_64857:
                     return ClientVersionBuild.V5_5_2_64068;
                 default:
                     return ClientVersionBuild.V3_3_5a_12340;
diff --git a/WowPacketParser/Enums/Version/UpdateFields.cs b/WowPacketParser/Enums/Version/UpdateFields.cs
index b71d666183..eb9ff41f76 100644
--- a/WowPacketParser/Enums/Version/UpdateFields.cs
+++ b/WowPacketParser/Enums/Version/UpdateFields.cs
@@ -1437,6 +1437,7 @@ private static string GetUpdateFieldDictionaryBuildName(ClientVersionBuild build
                 case ClientVersionBuild.V5_5_2_64133:
                 case ClientVersionBuild.V5_5_2_64271:
                 case ClientVersionBuild.V5_5_2_64481:
+                case ClientVersionBuild.V5_5_3_64857:
                 {
                     return "V5_5_2_64068";
                 }
diff --git a/WowPacketParser/Misc/ClientVersion.cs b/WowPacketParser/Misc/ClientVersion.cs
index 6db47fd0f9..9da7649e53 100644
--- a/WowPacketParser/Misc/ClientVersion.cs
+++ b/WowPacketParser/Misc/ClientVersion.cs
@@ -2345,6 +2345,7 @@ public static bool IsMoPClassicClientVersionBuild(ClientVersionBuild build)
                 case ClientVersionBuild.V5_5_2_64133:
                 case ClientVersionBuild.V5_5_2_64271:
                 case ClientVersionBuild.V5_5_2_64481:
+                case ClientVersionBuild.V5_5_3_64857:
                     return true;
                 default:
                     return false;