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 eae98554..04178dfe 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
@@ -52,6 +52,7 @@ public class ProtocolConstants
     public static final int MINECRAFT_1_21_5 = 770;
     public static final int MINECRAFT_1_21_6 = 771;
     public static final int MINECRAFT_1_21_7 = 772;
+    public static final int MINECRAFT_1_21_9 = 1073742088;
     public static final List<String> SUPPORTED_VERSIONS;
     public static final List<Integer> SUPPORTED_VERSION_IDS;
 
@@ -124,7 +125,7 @@ public class ProtocolConstants
         if ( SNAPSHOT_SUPPORT )
         {
             // supportedVersions.add( "1.21.x" );
-            // supportedVersionIds.add( ProtocolConstants.MINECRAFT_1_21_6 );
+            supportedVersionIds.add( ProtocolConstants.MINECRAFT_1_21_9 );
         }
 
         SUPPORTED_VERSIONS = supportedVersions.build();