diff --git a/build.gradle.kts b/build.gradle.kts
index c9a8186f..10517456 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -5,7 +5,7 @@ plugins {
 
 allprojects {
     group = "com.viaversion"
-    version = "4.1.0-21w39a-SNAPSHOT"
+    version = "4.1.0-21w40a-SNAPSHOT"
     description = "Allow older clients to join newer server versions."
 }
 
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/Protocol1_17_1To1_18.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/Protocol1_17_1To1_18.java
index eb9652d6..18f12eba 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/Protocol1_17_1To1_18.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/Protocol1_17_1To1_18.java
@@ -28,17 +28,18 @@ import com.viaversion.viaversion.api.minecraft.entities.Entity1_17Types;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.protocols.protocol1_17_1to1_17.ClientboundPackets1_17_1;
 import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.ServerboundPackets1_17;
+import com.viaversion.viaversion.protocols.protocol1_18to1_17_1.ClientboundPackets1_18;
 import com.viaversion.viaversion.protocols.protocol1_18to1_17_1.Protocol1_18To1_17_1;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 
-public final class Protocol1_17_1To1_18 extends BackwardsProtocol<ClientboundPackets1_17_1, ClientboundPackets1_17_1, ServerboundPackets1_17, ServerboundPackets1_17> {
+public final class Protocol1_17_1To1_18 extends BackwardsProtocol<ClientboundPackets1_18, ClientboundPackets1_17_1, ServerboundPackets1_17, ServerboundPackets1_17> {
 
     private static final BackwardsMappings MAPPINGS = new BackwardsMappings();
     private final EntityPackets1_18 entityRewriter = new EntityPackets1_18(this);
     private final BlockItemPackets1_18 itemRewriter = new BlockItemPackets1_18(this, null); //TODO translatablerewriter
 
     public Protocol1_17_1To1_18() {
-        super(ClientboundPackets1_17_1.class, ClientboundPackets1_17_1.class, ServerboundPackets1_17.class, ServerboundPackets1_17.class);
+        super(ClientboundPackets1_18.class, ClientboundPackets1_17_1.class, ServerboundPackets1_17.class, ServerboundPackets1_17.class);
     }
 
     @Override
@@ -49,14 +50,14 @@ public final class Protocol1_17_1To1_18 extends BackwardsProtocol<ClientboundPac
         itemRewriter.register();
 
         final SoundRewriter soundRewriter = new SoundRewriter(this);
-        soundRewriter.registerSound(ClientboundPackets1_17_1.SOUND);
-        soundRewriter.registerSound(ClientboundPackets1_17_1.ENTITY_SOUND);
-        soundRewriter.registerStopSound(ClientboundPackets1_17_1.STOP_SOUND);
-        soundRewriter.registerNamedSound(ClientboundPackets1_17_1.NAMED_SOUND);
+        soundRewriter.registerSound(ClientboundPackets1_18.SOUND);
+        soundRewriter.registerSound(ClientboundPackets1_18.ENTITY_SOUND);
+        soundRewriter.registerStopSound(ClientboundPackets1_18.STOP_SOUND);
+        soundRewriter.registerNamedSound(ClientboundPackets1_18.NAMED_SOUND);
 
         final TagRewriter tagRewriter = new TagRewriter(this);
         tagRewriter.addEmptyTag(RegistryType.BLOCK, "minecraft:lava_pool_stone_replaceables");
-        tagRewriter.registerGeneric(ClientboundPackets1_17_1.TAGS);
+        tagRewriter.registerGeneric(ClientboundPackets1_18.TAGS);
     }
 
     @Override
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/BlockItemPackets1_18.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/BlockItemPackets1_18.java
index 35a7ca1d..76475d8e 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/BlockItemPackets1_18.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/BlockItemPackets1_18.java
@@ -36,6 +36,7 @@ import com.viaversion.viaversion.libs.opennbt.tag.builtin.IntTag;
 import com.viaversion.viaversion.libs.opennbt.tag.builtin.StringTag;
 import com.viaversion.viaversion.protocols.protocol1_17_1to1_17.ClientboundPackets1_17_1;
 import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.types.Chunk1_17Type;
+import com.viaversion.viaversion.protocols.protocol1_18to1_17_1.ClientboundPackets1_18;
 import com.viaversion.viaversion.protocols.protocol1_18to1_17_1.types.Chunk1_18Type;
 import com.viaversion.viaversion.util.MathUtil;
 
@@ -57,24 +58,24 @@ public final class BlockItemPackets1_18 extends ItemRewriter<Protocol1_17_1To1_1
     protected void registerPackets() {
         /*final BlockRewriter blockRewriter = new BlockRewriter(protocol, Type.POSITION1_14);
 
-        new RecipeRewriter1_16(protocol).registerDefaultHandler(ClientboundPackets1_17_1.DECLARE_RECIPES);
+        new RecipeRewriter1_16(protocol).registerDefaultHandler(ClientboundPackets1_18.DECLARE_RECIPES);
 
-        registerSetCooldown(ClientboundPackets1_17_1.COOLDOWN);
-        registerWindowItems(ClientboundPackets1_17_1.WINDOW_ITEMS, Type.FLAT_VAR_INT_ITEM_ARRAY);
-        registerSetSlot(ClientboundPackets1_17_1.SET_SLOT, Type.FLAT_VAR_INT_ITEM);
-        registerEntityEquipmentArray(ClientboundPackets1_17_1.ENTITY_EQUIPMENT, Type.FLAT_VAR_INT_ITEM);
-        registerTradeList(ClientboundPackets1_17_1.TRADE_LIST, Type.FLAT_VAR_INT_ITEM);
-        registerAdvancements(ClientboundPackets1_17_1.ADVANCEMENTS, Type.FLAT_VAR_INT_ITEM);
-        registerClickWindow1_17(ServerboundPackets1_17.CLICK_WINDOW, Type.FLAT_VAR_INT_ITEM);
+        registerSetCooldown(ClientboundPackets1_18.COOLDOWN);
+        registerWindowItems(ClientboundPackets1_18.WINDOW_ITEMS, Type.FLAT_VAR_INT_ITEM_ARRAY);
+        registerSetSlot(ClientboundPackets1_18.SET_SLOT, Type.FLAT_VAR_INT_ITEM);
+        registerEntityEquipmentArray(ClientboundPackets1_18.ENTITY_EQUIPMENT, Type.FLAT_VAR_INT_ITEM);
+        registerTradeList(ClientboundPackets1_18.TRADE_LIST, Type.FLAT_VAR_INT_ITEM);
+        registerAdvancements(ClientboundPackets1_18.ADVANCEMENTS, Type.FLAT_VAR_INT_ITEM);
+        registerClickWindow1_17(ClientboundPackets1_18.CLICK_WINDOW, Type.FLAT_VAR_INT_ITEM);
 
-        blockRewriter.registerAcknowledgePlayerDigging(ClientboundPackets1_17_1.ACKNOWLEDGE_PLAYER_DIGGING);
-        blockRewriter.registerBlockAction(ClientboundPackets1_17_1.BLOCK_ACTION);
-        blockRewriter.registerEffect(ClientboundPackets1_17_1.EFFECT, 1010, 2001);
-        blockRewriter.registerBlockChange(ClientboundPackets1_17_1.BLOCK_CHANGE);
-        blockRewriter.registerVarLongMultiBlockChange(ClientboundPackets1_17_1.MULTI_BLOCK_CHANGE);
+        blockRewriter.registerAcknowledgePlayerDigging(ClientboundPackets1_18.ACKNOWLEDGE_PLAYER_DIGGING);
+        blockRewriter.registerBlockAction(ClientboundPackets1_18.BLOCK_ACTION);
+        blockRewriter.registerEffect(ClientboundPackets1_18.EFFECT, 1010, 2001);
+        blockRewriter.registerBlockChange(ClientboundPackets1_18.BLOCK_CHANGE);
+        blockRewriter.registerVarLongMultiBlockChange(ClientboundPackets1_18.MULTI_BLOCK_CHANGE);
 
-        registerCreativeInvAction(ServerboundPackets1_17.CREATIVE_INVENTORY_ACTION, Type.FLAT_VAR_INT_ITEM);
-        protocol.registerServerbound(ServerboundPackets1_17.EDIT_BOOK, new PacketRemapper() {
+        registerCreativeInvAction(ClientboundPackets1_18.CREATIVE_INVENTORY_ACTION, Type.FLAT_VAR_INT_ITEM);
+        protocol.registerServerbound(ClientboundPackets1_18.EDIT_BOOK, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> handleItemToServer(wrapper.passthrough(Type.FLAT_VAR_INT_ITEM)));
@@ -83,7 +84,7 @@ public final class BlockItemPackets1_18 extends ItemRewriter<Protocol1_17_1To1_1
 
         registerSpawnParticle(ClientboundPackets1_17_1.SPAWN_PARTICLE, Type.FLAT_VAR_INT_ITEM, Type.DOUBLE);*/
 
-        protocol.registerClientbound(ClientboundPackets1_17_1.BLOCK_ENTITY_DATA, new PacketRemapper() {
+        protocol.registerClientbound(ClientboundPackets1_18.BLOCK_ENTITY_DATA, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.POSITION1_14);
@@ -107,7 +108,7 @@ public final class BlockItemPackets1_18 extends ItemRewriter<Protocol1_17_1To1_1
             }
         });
 
-        protocol.registerClientbound(ClientboundPackets1_17_1.CHUNK_DATA, new PacketRemapper() {
+        protocol.registerClientbound(ClientboundPackets1_18.CHUNK_DATA, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {
@@ -184,5 +185,7 @@ public final class BlockItemPackets1_18 extends ItemRewriter<Protocol1_17_1To1_1
                 });
             }
         });
+
+        protocol.cancelClientbound(ClientboundPackets1_18.SET_SIMULATION_DISTANCE);
     }
 }
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/EntityPackets1_18.java b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/EntityPackets1_18.java
index 086bb0bb..8de8788c 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/EntityPackets1_18.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_17_1to1_18/packets/EntityPackets1_18.java
@@ -28,7 +28,7 @@ import com.viaversion.viaversion.libs.opennbt.tag.builtin.FloatTag;
 import com.viaversion.viaversion.libs.opennbt.tag.builtin.ListTag;
 import com.viaversion.viaversion.libs.opennbt.tag.builtin.StringTag;
 import com.viaversion.viaversion.libs.opennbt.tag.builtin.Tag;
-import com.viaversion.viaversion.protocols.protocol1_17_1to1_17.ClientboundPackets1_17_1;
+import com.viaversion.viaversion.protocols.protocol1_18to1_17_1.ClientboundPackets1_18;
 
 import java.util.ArrayList;
 
@@ -40,15 +40,15 @@ public final class EntityPackets1_18 extends EntityRewriter<Protocol1_17_1To1_18
 
     @Override
     protected void registerPackets() {
-        /*registerTrackerWithData(ClientboundPackets1_17_1.SPAWN_ENTITY, Entity1_18Types.FALLING_BLOCK);
-        registerSpawnTracker(ClientboundPackets1_17_1.SPAWN_MOB);
-        registerTracker(ClientboundPackets1_17_1.SPAWN_EXPERIENCE_ORB, Entity1_18Types.EXPERIENCE_ORB);
-        registerTracker(ClientboundPackets1_17_1.SPAWN_PAINTING, Entity1_18Types.PAINTING);
-        registerTracker(ClientboundPackets1_17_1.SPAWN_PLAYER, Entity1_18Types.PLAYER);
-        registerMetadataRewriter(ClientboundPackets1_17_1.ENTITY_METADATA, Types1_17.METADATA_LIST);
-        registerRemoveEntities(ClientboundPackets1_17_1.REMOVE_ENTITIES);*/
+        /*registerTrackerWithData(ClientboundPackets1_18.SPAWN_ENTITY, Entity1_18Types.FALLING_BLOCK);
+        registerSpawnTracker(ClientboundPackets1_18.SPAWN_MOB);
+        registerTracker(ClientboundPackets1_18.SPAWN_EXPERIENCE_ORB, Entity1_18Types.EXPERIENCE_ORB);
+        registerTracker(ClientboundPackets1_18.SPAWN_PAINTING, Entity1_18Types.PAINTING);
+        registerTracker(ClientboundPackets1_18.SPAWN_PLAYER, Entity1_18Types.PLAYER);
+        registerMetadataRewriter(ClientboundPackets1_18.ENTITY_METADATA, Types1_17.METADATA_LIST);
+        registerRemoveEntities(ClientboundPackets1_18.REMOVE_ENTITIES);*/
 
-        protocol.registerClientbound(ClientboundPackets1_17_1.JOIN_GAME, new PacketRemapper() {
+        protocol.registerClientbound(ClientboundPackets1_18.JOIN_GAME, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // Entity ID
@@ -59,6 +59,10 @@ public final class EntityPackets1_18 extends EntityRewriter<Protocol1_17_1To1_18
                 map(Type.NBT); // Dimension registry
                 map(Type.NBT); // Current dimension data
                 map(Type.STRING); // World
+                map(Type.LONG); // Seed
+                map(Type.VAR_INT); // Max players
+                map(Type.VAR_INT); // Chunk radius
+                read(Type.VAR_INT); // Read simulation distance
                 //handler(getTrackerHandler(Entity1_17Types.PLAYER, Type.INT)); //TODO
                 handler(worldDataTrackerHandler(1));
                 handler(wrapper -> {
@@ -84,7 +88,7 @@ public final class EntityPackets1_18 extends EntityRewriter<Protocol1_17_1To1_18
             }
         });
 
-        protocol.registerClientbound(ClientboundPackets1_17_1.RESPAWN, new PacketRemapper() {
+        protocol.registerClientbound(ClientboundPackets1_18.RESPAWN, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.NBT); // Dimension data
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 601bc815..4d0c1211 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -3,7 +3,7 @@ metadata.format.version = "1.1"
 [versions]
 
 # ViaVersion
-viaver = "4.1.0-21w39a-SNAPSHOT"
+viaver = "4.1.0-21w40a-SNAPSHOT"
 
 # Common provided
 netty = "4.0.20.Final"