diff --git a/MinecraftClient/Program.cs b/MinecraftClient/Program.cs
index cd74e0b4..3072446e 100644
--- a/MinecraftClient/Program.cs
+++ b/MinecraftClient/Program.cs
@@ -46,7 +46,7 @@ namespace MinecraftClient
 
         public const string Version = MCHighestVersion;
         public const string MCLowestVersion = "1.4.6";
-        public const string MCHighestVersion = "1.20";
+        public const string MCHighestVersion = "1.20.1";
         public static readonly string? BuildInfo = null;
 
         private static Tuple<Thread, CancellationTokenSource>? offlinePrompt = null;
diff --git a/MinecraftClient/Protocol/ProtocolHandler.cs b/MinecraftClient/Protocol/ProtocolHandler.cs
index c3a2853c..0128d460 100644
--- a/MinecraftClient/Protocol/ProtocolHandler.cs
+++ b/MinecraftClient/Protocol/ProtocolHandler.cs
@@ -318,6 +318,7 @@ namespace MinecraftClient.Protocol
                     case "1.19.4":
                         return 762;
                     case "1.20":
+                    case "1.20.1":
                         return 763;
                     default:
                         return 0;