diff --git a/MinecraftClient/Program.cs b/MinecraftClient/Program.cs
index 28e76d95..6614068d 100644
--- a/MinecraftClient/Program.cs
+++ b/MinecraftClient/Program.cs
@@ -23,7 +23,7 @@ namespace MinecraftClient
 
         public const string Version = MCHighestVersion;
         public const string MCLowestVersion = "1.4.6";
-        public const string MCHighestVersion = "1.13";
+        public const string MCHighestVersion = "1.13.1";
         public static readonly string BuildInfo = null;
 
         private static Thread offlinePrompt = null;
diff --git a/MinecraftClient/Protocol/ProtocolHandler.cs b/MinecraftClient/Protocol/ProtocolHandler.cs
index 207027d9..a1e45b64 100644
--- a/MinecraftClient/Protocol/ProtocolHandler.cs
+++ b/MinecraftClient/Protocol/ProtocolHandler.cs
@@ -106,7 +106,7 @@ namespace MinecraftClient.Protocol
             int[] supportedVersions_Protocol16 = { 51, 60, 61, 72, 73, 74, 78 };
             if (Array.IndexOf(supportedVersions_Protocol16, ProtocolVersion) > -1)
                 return new Protocol16Handler(Client, ProtocolVersion, Handler);
-            int[] supportedVersions_Protocol18 = { 4, 5, 47, 107, 108, 109, 110, 210, 315, 316, 335, 338, 340, 393 };
+            int[] supportedVersions_Protocol18 = { 4, 5, 47, 107, 108, 109, 110, 210, 315, 316, 335, 338, 340, 393, 401 };
             if (Array.IndexOf(supportedVersions_Protocol18, ProtocolVersion) > -1)
                 return new Protocol18Handler(Client, ProtocolVersion, Handler, forgeInfo);
             throw new NotSupportedException("The protocol version no." + ProtocolVersion + " is not supported.");
@@ -191,6 +191,8 @@ namespace MinecraftClient.Protocol
                         return 340;
                     case "1.13":
                         return 393;
+                    case "1.13.1":
+                        return 401;
                     default:
                         return 0;
                 }