diff --git a/README.md b/README.md
index c2417806c..fa5a624e4 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@
   <a href="#Baritone"><img src="https://img.shields.io/badge/MC-1.19.2-brightgreen.svg" alt="Minecraft"/></a>
   <a href="#Baritone"><img src="https://img.shields.io/badge/MC-1.19.4-brightgreen.svg" alt="Minecraft"/></a>
   <a href="#Baritone"><img src="https://img.shields.io/badge/MC-1.20.1-brightgreen.svg" alt="Minecraft"/></a>
+  <a href="#Baritone"><img src="https://img.shields.io/badge/MC-1.21.3-brightgreen.svg" alt="Minecraft"/></a>
 </p>
 
 <p align="center">
@@ -70,6 +71,7 @@ Baritone is the pathfinding system used in [Impact](https://impactclient.net/) s
 | [1.20.1 Forge](https://github.com/cabaletta/baritone/releases/download/v1.10.1/baritone-api-forge-1.10.1.jar)   | [1.20.1 Fabric](https://github.com/cabaletta/baritone/releases/download/v1.10.1/baritone-api-fabric-1.10.1.jar) |
 | [1.20.3 Forge](https://github.com/cabaletta/baritone/releases/download/v1.10.2/baritone-api-forge-1.10.2.jar)   | [1.20.3 Fabric](https://github.com/cabaletta/baritone/releases/download/v1.10.2/baritone-api-fabric-1.10.2.jar) |
 | [1.20.4 Forge](https://github.com/cabaletta/baritone/releases/download/v1.10.2/baritone-api-forge-1.10.2.jar)   | [1.20.4 Fabric](https://github.com/cabaletta/baritone/releases/download/v1.10.2/baritone-api-fabric-1.10.2.jar) |
+| [1.21.3 Forge](https://github.com/cabaletta/baritone/releases/download/v1.11.1/baritone-api-forge-1.11.1.jar)   | [1.21.3 Fabric](https://github.com/cabaletta/baritone/releases/download/v1.11.1/baritone-api-fabric-1.11.1.jar) |
 
 **Message for 2b2t players looking for 1.19/1.20 Baritone** If you like, please try the beta for Baritone Elytra for 2b2t, find it in #announcements of [the Baritone discord](http://discord.gg/s6fRBAUpmr). It supports 1.19.4 and 1.20.1, Forge or Fabric. If you have to see it to believe it, watch [this YouTube video](https://youtu.be/NnSlQi-68eQ).
 
diff --git a/src/api/java/baritone/api/utils/BlockOptionalMeta.java b/src/api/java/baritone/api/utils/BlockOptionalMeta.java
index 1d5af8359..17df9a3b2 100644
--- a/src/api/java/baritone/api/utils/BlockOptionalMeta.java
+++ b/src/api/java/baritone/api/utils/BlockOptionalMeta.java
@@ -21,28 +21,23 @@
 import baritone.api.utils.accessor.ILootTable;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
-import net.minecraft.Util;
 import net.minecraft.client.Minecraft;
-import net.minecraft.commands.Commands;
+import net.minecraft.core.HolderLookup;
 import net.minecraft.core.LayeredRegistryAccess;
 import net.minecraft.core.Registry;
 import net.minecraft.core.RegistryAccess;
 import net.minecraft.resources.RegistryDataLoader;
 import net.minecraft.resources.ResourceKey;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.RegistryLayer;
 import net.minecraft.server.ReloadableServerRegistries;
-import net.minecraft.server.ReloadableServerResources;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.progress.ChunkProgressListener;
 import net.minecraft.server.packs.PackType;
 import net.minecraft.server.packs.VanillaPackResources;
-import net.minecraft.server.packs.repository.PackRepository;
 import net.minecraft.server.packs.repository.ServerPacksSource;
 import net.minecraft.server.packs.resources.CloseableResourceManager;
 import net.minecraft.server.packs.resources.MultiPackResourceManager;
-import net.minecraft.server.packs.resources.ResourceManager;
 import net.minecraft.tags.TagLoader;
 import net.minecraft.world.RandomSequences;
 import net.minecraft.world.flag.FeatureFlagSet;
@@ -51,14 +46,12 @@
 import net.minecraft.world.item.Items;
 import net.minecraft.world.level.CustomSpawner;
 import net.minecraft.world.level.Level;
-import net.minecraft.world.level.WorldDataConfiguration;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.block.state.properties.Property;
 import net.minecraft.world.level.dimension.LevelStem;
 import net.minecraft.world.level.storage.LevelStorageSource;
 import net.minecraft.world.level.storage.ServerLevelData;
-import net.minecraft.world.level.storage.loot.BuiltInLootTables;
 import net.minecraft.world.level.storage.loot.LootContext;
 import net.minecraft.world.level.storage.loot.LootParams;
 import net.minecraft.world.level.storage.loot.LootTable;
@@ -307,11 +300,26 @@ public static Unsafe getUnsafe() {
         }
 
         public static CompletableFuture<RegistryAccess> load() {
-            PackRepository packRepository = Minecraft.getInstance().getResourcePackRepository();
-            CloseableResourceManager closeableResourceManager = new MultiPackResourceManager(PackType.SERVER_DATA, packRepository.openAllSelected());
-            LayeredRegistryAccess<RegistryLayer> layeredRegistryAccess = RegistryLayer.createRegistryAccess();
+            // Simplified from {@link net.minecraft.server.WorldLoader#load()}
+            CloseableResourceManager closeableResourceManager = new MultiPackResourceManager(
+                PackType.SERVER_DATA,
+                List.of(ServerPacksSource.createVanillaPackSource())
+            );
+            LayeredRegistryAccess<RegistryLayer> baseLayeredRegistry = RegistryLayer.createRegistryAccess();
             List<Registry.PendingTags<?>> pendingTags = TagLoader.loadTagsForExistingRegistries(
-                closeableResourceManager, layeredRegistryAccess.getLayer(RegistryLayer.STATIC)
+                closeableResourceManager, baseLayeredRegistry.getLayer(RegistryLayer.STATIC)
+            );
+            List<HolderLookup.RegistryLookup<?>> worldGenRegistryLookupList = TagLoader.buildUpdatedLookups(
+                baseLayeredRegistry.getAccessForLoading(RegistryLayer.WORLDGEN),
+                pendingTags
+            );
+            LayeredRegistryAccess<RegistryLayer> layeredRegistryAccess = baseLayeredRegistry.replaceFrom(
+                RegistryLayer.WORLDGEN,
+                RegistryDataLoader.load(
+                    closeableResourceManager,
+                    worldGenRegistryLookupList,
+                    RegistryDataLoader.WORLDGEN_REGISTRIES
+                )
             );
             return ReloadableServerRegistries.reload(
                 layeredRegistryAccess,
diff --git a/src/main/java/baritone/utils/schematic/litematica/LitematicaHelper.java b/src/main/java/baritone/utils/schematic/litematica/LitematicaHelper.java
index 081d32cc8..febe985d2 100644
--- a/src/main/java/baritone/utils/schematic/litematica/LitematicaHelper.java
+++ b/src/main/java/baritone/utils/schematic/litematica/LitematicaHelper.java
@@ -29,6 +29,7 @@
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Vec3i;
 import net.minecraft.util.Tuple;
+import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.Mirror;
 import net.minecraft.world.level.block.Rotation;
 import net.minecraft.world.level.block.state.BlockState;
@@ -98,7 +99,7 @@ public static Tuple<IStaticSchematic, Vec3i> getSchematic(int i) {
         int minY = Integer.MAX_VALUE;
         int minZ = Integer.MAX_VALUE;
         HashMap<Vec3i, StaticSchematic> subRegions = new HashMap<>();
-        WorldSchematic schematicWorld = SchematicWorldHandler.getSchematicWorld();
+        Level schematicWorld = SchematicWorldHandler.getSchematicWorld();
         for (Map.Entry<String, SubRegionPlacement> entry : placement.getEnabledRelativeSubRegionPlacements().entrySet()) {
             SubRegionPlacement subPlacement = entry.getValue();
             Vec3i pos = transform(subPlacement.getPos(), placement.getMirror(), placement.getRotation());
@@ -152,4 +153,4 @@ public String toString() {
             return name;
         }
     }
-}
\ No newline at end of file
+}