diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/ProtocolConstants.java b/protocol/src/main/java/net/md_5/bungee/protocol/ProtocolConstants.java
index 182614c47..9b3fb5841 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/ProtocolConstants.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/ProtocolConstants.java
@@ -45,7 +45,7 @@ public class ProtocolConstants
     public static final int MINECRAFT_1_20 = 763;
     public static final int MINECRAFT_1_20_2 = 764;
     public static final int MINECRAFT_1_20_3 = 765;
-    public static final int MINECRAFT_1_20_5 = 1073742011;
+    public static final int MINECRAFT_1_20_5 = 1073742013;
     public static final List<String> SUPPORTED_VERSIONS;
     public static final List<Integer> SUPPORTED_VERSION_IDS;
 
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/packet/LoginSuccess.java b/protocol/src/main/java/net/md_5/bungee/protocol/packet/LoginSuccess.java
index 07fb3d79a..60ff5700c 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/packet/LoginSuccess.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/packet/LoginSuccess.java
@@ -37,6 +37,11 @@ public class LoginSuccess extends DefinedPacket
         {
             properties = readProperties( buf );
         }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_5 )
+        {
+            // Whether the client should disconnect on its own if it receives invalid data from the server
+            buf.readBoolean();
+        }
     }
 
     @Override
@@ -54,6 +59,12 @@ public class LoginSuccess extends DefinedPacket
         {
             writeProperties( properties, buf );
         }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_5 )
+        {
+            // Whether the client should disconnect on its own if it receives invalid data from the server
+            // Vanilla sends true so we also send true
+            buf.writeBoolean( true );
+        }
     }
 
     @Override