diff --git a/ClassicalSharp/Network/Enums.cs b/ClassicalSharp/Network/Enums.cs
index cb96fa891..e3f8e4be7 100644
--- a/ClassicalSharp/Network/Enums.cs
+++ b/ClassicalSharp/Network/Enums.cs
@@ -41,6 +41,8 @@ namespace ClassicalSharp {
 		CpePlayerClick = 34,
 		CpeDefineBlock = 35,
 		CpeRemoveBlockDefinition = 36,
+		CpeDefineBlockExt = 37,
+		CpeBulkBlockUpdate = 38,
 	}
 	
 	public enum CpeMessage {
diff --git a/ClassicalSharp/Network/NetworkProcessor.CPE.cs b/ClassicalSharp/Network/NetworkProcessor.CPE.cs
index 26ddeb210..ebdb70845 100644
--- a/ClassicalSharp/Network/NetworkProcessor.CPE.cs
+++ b/ClassicalSharp/Network/NetworkProcessor.CPE.cs
@@ -2,6 +2,7 @@
 using ClassicalSharp.Hotkeys;
 using ClassicalSharp.Network;
 using ClassicalSharp.TexturePack;
+using OpenTK;
 using OpenTK.Input;
 
 namespace ClassicalSharp {
@@ -63,7 +64,7 @@ namespace ClassicalSharp {
 			"HackControl", "MessageTypes", "PlayerClick",
 			"FullCP437", "LongerMessages",
 			// proposals
-			"BlockDefinitions", "BlockDefinitionsExt", "BulkBlockUpdate",
+			"BlockDefinitions", "BlockDefinitionsExt",
 		};
 		
 		void HandleCpeExtInfo() {
@@ -409,13 +410,17 @@ namespace ClassicalSharp {
 		void HandleCpeDefineBlockExt() {
 			byte block = HandleCpeDefineBlockCommonStart();
 			BlockInfo info = game.BlockInfo;
+			Vector3 min, max;
 			
-			info.MinBB[block].X = Math.Min( 15/16f, reader.ReadUInt8() / 16f );
-			info.MinBB[block].Y = Math.Min( 15/16f, reader.ReadUInt8() / 16f );
-			info.MinBB[block].Z = Math.Min( 15/16f, reader.ReadUInt8() / 16f );
-			info.MaxBB[block].X = Math.Min( 1, reader.ReadUInt8() / 16f );
-			info.MaxBB[block].Y = Math.Min( 1, reader.ReadUInt8() / 16f );
-			info.MaxBB[block].Z = Math.Min( 1, reader.ReadUInt8() / 16f );
+			min.X = reader.ReadUInt8() / 16f; Utils.Clamp( ref min.X, 0, 15/16f );
+			min.Y = reader.ReadUInt8() / 16f; Utils.Clamp( ref min.Y, 0, 15/16f );
+			min.Z = reader.ReadUInt8() / 16f; Utils.Clamp( ref min.Z, 0, 15/16f );
+			max.X = reader.ReadUInt8() / 16f; Utils.Clamp( ref max.X, 1/16f, 1 );
+			max.Y = reader.ReadUInt8() / 16f; Utils.Clamp( ref max.Y, 1/16f, 1 );
+			max.Z = reader.ReadUInt8() / 16f; Utils.Clamp( ref max.Z, 1/16f, 1 );
+			
+			info.MinBB[block] = min;
+			info.MaxBB[block] = max;
 			HandleCpeDefineBlockCommonEnd( block );
 		}
 		
diff --git a/ClassicalSharp/Network/NetworkProcessor.cs b/ClassicalSharp/Network/NetworkProcessor.cs
index e07a00706..08d4f19d8 100644
--- a/ClassicalSharp/Network/NetworkProcessor.cs
+++ b/ClassicalSharp/Network/NetworkProcessor.cs
@@ -149,7 +149,8 @@ namespace ClassicalSharp {
 		readonly int[] packetSizes = {
 			131, 1, 1, 1028, 7, 9, 8, 74, 10, 7, 5, 4, 2,
 			66, 65, 2, 67, 69, 3, 2, 3, 134, 196, 130, 3,
-			8, 86, 2, 4, 66, 69, 2, 8, 138, 0, 80, 2, 1282,
+			8, 86, 2, 4, 66, 69, 2, 8, 138, 0, 80, 2, 85,
+			1282,
 		};
 		
 		NetWriter writer;