diff --git a/gradle.properties b/gradle.properties
index 9cb123ed7..5ebca8a3e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,7 +2,7 @@ group = org.purpurmc.purpur
 version = 1.21.4-R0.1-SNAPSHOT
 
 mcVersion = 1.21.4
-paperCommit = c467df95a29e6c3d42b7e6f49513e924f9ba2ece
+paperCommit = 9b1798d6438107fdf0d5939b79a8cf71f4d16e2c
 
 org.gradle.configuration-cache = true
 org.gradle.caching = true
diff --git a/purpur-server/minecraft-patches/sources/net/minecraft/server/network/ServerCommonPacketListenerImpl.java.patch b/purpur-server/minecraft-patches/sources/net/minecraft/server/network/ServerCommonPacketListenerImpl.java.patch
index 4405b9245..ea070a65e 100644
--- a/purpur-server/minecraft-patches/sources/net/minecraft/server/network/ServerCommonPacketListenerImpl.java.patch
+++ b/purpur-server/minecraft-patches/sources/net/minecraft/server/network/ServerCommonPacketListenerImpl.java.patch
@@ -33,21 +33,25 @@
          if (this.keepAlivePending && packet.getId() == this.keepAliveChallenge) {
              int i = (int)(Util.getMillis() - this.keepAliveTime);
              this.latency = (this.latency * 3 + i) / 4;
-@@ -159,6 +_,13 @@
-                 ServerGamePacketListenerImpl.LOGGER.error("Couldn't register custom payload", ex);
-                 this.disconnect(Component.literal("Invalid payload REGISTER!"), org.bukkit.event.player.PlayerKickEvent.Cause.INVALID_PAYLOAD); // Paper - kick event cause
+@@ -169,10 +_,17 @@
+                 return;
              }
-+        // Purpur start - Purpur client support
-+        } else if (identifier.equals(PURPUR_CLIENT)) {
-+            try {
-+                player.purpurClient = true;
-+            } catch (Exception ignore) {
+ 
++            // Purpur start - Purpur client support
++            if (identifier.equals(PURPUR_CLIENT)) {
++                this.player.purpurClient = true;
 +            }
-+        // Purpur end - Purpur client support
-         } else if (identifier.equals(ServerCommonPacketListenerImpl.CUSTOM_UNREGISTER)) {
-             try {
-                 String channels = payload.toString(com.google.common.base.Charsets.UTF_8);
-@@ -238,6 +_,22 @@
++            // Purpur end - Purpur client support
++
+             if (identifier.equals(MINECRAFT_BRAND)) {
+                 this.player.clientBrandName = new net.minecraft.network.FriendlyByteBuf(io.netty.buffer.Unpooled.wrappedBuffer(data)).readUtf(256);
+             }
+ 
++
+             this.cserver.getMessenger().dispatchIncomingMessage(this.player.getBukkitEntity(), identifier.toString(), data);
+         } catch (final Exception e) {
+             ServerGamePacketListenerImpl.LOGGER.error("Couldn't handle custom payload on channel {}", identifier, e);
+@@ -242,6 +_,22 @@
          // Paper start - give clients a longer time to respond to pings as per pre 1.12.2 timings
          // This should effectively place the keepalive handling back to "as it was" before 1.12.2
          final long elapsedTime = millis - this.keepAliveTime;
diff --git a/purpur-server/paper-patches/features/0005-Add-EntityTeleportHinderedEvent.patch b/purpur-server/paper-patches/features/0005-Add-EntityTeleportHinderedEvent.patch
index 828db575c..f2d0b40da 100644
--- a/purpur-server/paper-patches/features/0005-Add-EntityTeleportHinderedEvent.patch
+++ b/purpur-server/paper-patches/features/0005-Add-EntityTeleportHinderedEvent.patch
@@ -29,10 +29,10 @@ index 71cc3b64ee27118badcdd6214cb1c6a120202f44..623e4c9985e04edeeac1cdf1d8f89be4
          }
  
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
-index 4dd2c2c824ffc7c6da02a3e740b4025459073295..db2cd4603c26bca59654f0a5225b18c446a7f612 100644
+index 5bdfbb14db9f84647ae9b46b036e819ab0c334e2..d2010fc46215c37c3ef1d8a75cc39bce655d2c3f 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
-@@ -1441,6 +1441,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+@@ -1436,6 +1436,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
          // Paper start - Teleport passenger API
          // Don't allow teleporting between worlds while keeping passengers
          if (ignorePassengers && entity.isVehicle() && location.getWorld() != this.getWorld()) {
@@ -40,7 +40,7 @@ index 4dd2c2c824ffc7c6da02a3e740b4025459073295..db2cd4603c26bca59654f0a5225b18c4
              return false;
          }
  
-@@ -1462,6 +1463,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+@@ -1457,6 +1458,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
          }
  
          if (entity.isVehicle() && !ignorePassengers) { // Paper - Teleport API
diff --git a/purpur-server/paper-patches/files/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java.patch b/purpur-server/paper-patches/files/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java.patch
index b3328ecef..50e5c0105 100644
--- a/purpur-server/paper-patches/files/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java.patch
+++ b/purpur-server/paper-patches/files/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java.patch
@@ -1,6 +1,6 @@
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
-@@ -594,10 +_,15 @@
+@@ -589,10 +_,15 @@
  
      @Override
      public void setPlayerListName(String name) {
@@ -17,7 +17,7 @@
          if (this.getHandle().connection == null) return; // Paper - Updates are possible before the player has fully joined
          for (ServerPlayer player : (List<ServerPlayer>) this.server.getHandle().players) {
              if (player.getBukkitEntity().canSee(this)) {
-@@ -2755,6 +_,28 @@
+@@ -2750,6 +_,28 @@
          return this.getHandle().getAbilities().walkingSpeed * 2f;
      }
  
@@ -46,7 +46,7 @@
      private void validateSpeed(float value) {
          Preconditions.checkArgument(value <= 1f && value >= -1f, "Speed value (%s) need to be between -1f and 1f", value);
      }
-@@ -3624,4 +_,76 @@
+@@ -3619,4 +_,76 @@
      public void setSimplifyContainerDesyncCheck(final boolean simplifyContainerDesyncCheck) {
          this.simplifyContainerDesyncCheck = simplifyContainerDesyncCheck;
      }