diff --git a/build.gradle b/build.gradle
index 0483335..36bb4d9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -29,9 +29,11 @@ dependencies {
     // modImplementation so Loom loads it as a mod in the dev runtime; plain
     // implementation only adds it to the classpath, so Loader can't find the `fabric` mod.
     implementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
-    shadow('com.maxmind.geoip2:geoip2:4.2.0')
-    shadow("io.javalin:javalin:6.4.0")
-    include(implementation "io.ib67.kiwi:lang:1.2.3-SNAPSHOT")
+    shadow('com.maxmind.geoip2:geoip2:5.2.0')
+    shadow("io.javalin:javalin:7.2.2") {
+        exclude group: "org.eclipse.jetty.ee10", module: "jetty-ee10-annotations"
+    }
+    shadow("io.ib67.kiwi:lang:1.2.3-SNAPSHOT")
     shadow('com.github.houbb:pinyin:0.4.0')
     shadow('com.google.inject:guice:7.0.0') {
         exclude group: 'com.google.guava', module: 'guava'
@@ -44,6 +46,7 @@ configurations.implementation.extendsFrom(configurations.shadow)
 shadowJar {
     configurations = [project.configurations.shadow]
     exclude("META-INF")
+    relocate 'kotlin', 'sfcraft-kotlin'
 }
 
 processResources {
diff --git a/src/main/java/io/ib67/sfcraft/geoip/MaxMindGeoIPService.java b/src/main/java/io/ib67/sfcraft/geoip/MaxMindGeoIPService.java
index 04f14b9..03da3d9 100644
--- a/src/main/java/io/ib67/sfcraft/geoip/MaxMindGeoIPService.java
+++ b/src/main/java/io/ib67/sfcraft/geoip/MaxMindGeoIPService.java
@@ -40,19 +40,19 @@ public class MaxMindGeoIPService implements Module, GeoIPService {
     @Override
     @SneakyThrows
     public Clock clockOf(InetAddress address) throws GeoIp2Exception {
-        return Clock.system(TimeZone.getTimeZone(databaseReader.city(address).getLocation().getTimeZone()).toZoneId());
+        return Clock.system(TimeZone.getTimeZone(databaseReader.city(address).location().timeZone()).toZoneId());
     }
 
     @Override
     @SneakyThrows
     public City cityOf(InetAddress address) throws GeoIp2Exception {
-        return databaseReader.city(address).getCity();
+        return databaseReader.city(address).city();
     }
 
     @Override
     @SneakyThrows
     public Country countryOf(InetAddress address) throws GeoIp2Exception {
-        return databaseReader.country(address).getCountry();
+        return databaseReader.country(address).country();
     }
 
     @SneakyThrows
diff --git a/src/main/java/io/ib67/sfcraft/mixin/common/ZombieMixin.java b/src/main/java/io/ib67/sfcraft/mixin/common/ZombieMixin.java
index 11acfd3..17a94ef 100644
--- a/src/main/java/io/ib67/sfcraft/mixin/common/ZombieMixin.java
+++ b/src/main/java/io/ib67/sfcraft/mixin/common/ZombieMixin.java
@@ -1,7 +1,6 @@
 package io.ib67.sfcraft.mixin.common;
 
 import net.minecraft.world.entity.monster.zombie.Zombie;
-import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.Items;
 import org.spongepowered.asm.mixin.Mixin;
diff --git a/src/main/java/io/ib67/sfcraft/mixin/common/bridge/ItemBridge.java b/src/main/java/io/ib67/sfcraft/mixin/common/bridge/ItemBridge.java
deleted file mode 100644
index 4eeb7aa..0000000
--- a/src/main/java/io/ib67/sfcraft/mixin/common/bridge/ItemBridge.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package io.ib67.sfcraft.mixin.common.bridge;
-
-import net.minecraft.core.Holder;
-import net.minecraft.world.item.Item;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.gen.Accessor;
-
-@Mixin(Item.class)
-public interface ItemBridge {
-    @Accessor
-    void setBuiltInRegistryHolder(Holder.Reference<Item> value);
-}
diff --git a/src/main/java/io/ib67/sfcraft/mixin/common/bridge/ServerWorldBridge.java b/src/main/java/io/ib67/sfcraft/mixin/common/bridge/ServerWorldBridge.java
index b7f828a..8375a93 100644
--- a/src/main/java/io/ib67/sfcraft/mixin/common/bridge/ServerWorldBridge.java
+++ b/src/main/java/io/ib67/sfcraft/mixin/common/bridge/ServerWorldBridge.java
@@ -8,5 +8,5 @@ import org.spongepowered.asm.mixin.gen.Accessor;
 @Mixin(ServerLevel.class)
 public interface ServerWorldBridge {
     @Accessor
-    SleepStatus getDEEPSLATE_BRICKS();
+    SleepStatus getSleepStatus();
 }
diff --git a/src/main/java/io/ib67/sfcraft/mixin/server/AbstractFurnaceBlockMixin.java b/src/main/java/io/ib67/sfcraft/mixin/server/AbstractFurnaceBlockMixin.java
index 41cb00f..8821ba2 100644
--- a/src/main/java/io/ib67/sfcraft/mixin/server/AbstractFurnaceBlockMixin.java
+++ b/src/main/java/io/ib67/sfcraft/mixin/server/AbstractFurnaceBlockMixin.java
@@ -40,7 +40,7 @@ public abstract class AbstractFurnaceBlockMixin extends BaseEntityBlock {
         var world = (ServerLevel) _world;
         AbstractFurnaceBlockEntity.serverTick(world, pos, state, blockEntity);
         int i = world.getGameRules().get(GameRules.PLAYERS_SLEEPING_PERCENTAGE);
-        if (((ServerWorldBridge) world).getDEEPSLATE_BRICKS().areEnoughSleeping(i)) {
+        if (((ServerWorldBridge) world).getSleepStatus().areEnoughSleeping(i)) {
             AbstractFurnaceBlockEntity.serverTick(world, pos, state, blockEntity); //todo: config support?
             AbstractFurnaceBlockEntity.serverTick(world, pos, state, blockEntity);
         }
diff --git a/src/main/java/io/ib67/sfcraft/mixin/server/ServerPlayNetworkHandlerMixin.java b/src/main/java/io/ib67/sfcraft/mixin/server/ServerPlayNetworkHandlerMixin.java
index ee5095f..e6bfa85 100644
--- a/src/main/java/io/ib67/sfcraft/mixin/server/ServerPlayNetworkHandlerMixin.java
+++ b/src/main/java/io/ib67/sfcraft/mixin/server/ServerPlayNetworkHandlerMixin.java
@@ -24,12 +24,12 @@ public abstract class ServerPlayNetworkHandlerMixin {
      * @author icybear
      * @reason small method, overwrite to reduce overhead
      */
-    @Redirect(method = "method_44900", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/MinecraftServer;getChatDecorator()Lnet/minecraft/network/chat/ChatDecorator;"))
+    @Redirect(method = "lambda$handleChat$0", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/MinecraftServer;getChatDecorator()Lnet/minecraft/network/chat/ChatDecorator;"))
     public ChatDecorator getMessageDecorator(MinecraftServer instance) {
         return SFCraft.getInjector().getInstance(SimpleMessageDecorator.class);
     }
 
-    @Redirect(method = "tick", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/network/ServerGamePacketListenerImpl;disconnect(Lnet/minecraft/network/chat/Component;)V", ordinal = 2))
+    @Redirect(method = "tick", at = @At(value = "INVOKE", target = "Lnet/minecraft/server/network/ServerGamePacketListenerImpl;disconnect(Lnet/minecraft/network/chat/Component;)V"))
     public void onPlayerIdling(ServerGamePacketListenerImpl instance, Component text) {
         ((ServerPlayerBridge) instance.player).setLastActionTime(Long.MAX_VALUE);
         SFCallbacks.PLAYER_IDLE.invoker().onSwitchIdle(instance.player, true);
diff --git a/src/main/java/io/ib67/sfcraft/mixin/server/ServerWorldMixin.java b/src/main/java/io/ib67/sfcraft/mixin/server/ServerWorldMixin.java
index 9964db9..a17fe9e 100644
--- a/src/main/java/io/ib67/sfcraft/mixin/server/ServerWorldMixin.java
+++ b/src/main/java/io/ib67/sfcraft/mixin/server/ServerWorldMixin.java
@@ -12,7 +12,7 @@ public abstract class ServerWorldMixin {
     @ModifyArg(method = "tickTime", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/level/storage/ServerLevelData;setGameTime(J)V"))
     public long setTimeOfDay(long timeOfDay) {
         int i = ((ServerLevel) (Object) this).getGameRules().get(GameRules.PLAYERS_SLEEPING_PERCENTAGE);
-        if (((ServerWorldBridge) this).getDEEPSLATE_BRICKS().areEnoughSleeping(i)) {
+        if (((ServerWorldBridge) this).getSleepStatus().areEnoughSleeping(i)) {
             MixinHelper.spedUp = true;
             return timeOfDay + 10;
         }
diff --git a/src/main/java/io/ib67/sfcraft/mixin/server/subserver/PlayerSaveHandlerMixin.java b/src/main/java/io/ib67/sfcraft/mixin/server/subserver/PlayerSaveHandlerMixin.java
index 678360b..e89299e 100644
--- a/src/main/java/io/ib67/sfcraft/mixin/server/subserver/PlayerSaveHandlerMixin.java
+++ b/src/main/java/io/ib67/sfcraft/mixin/server/subserver/PlayerSaveHandlerMixin.java
@@ -3,6 +3,7 @@ package io.ib67.sfcraft.mixin.server.subserver;
 import com.mojang.datafixers.DataFixer;
 import io.ib67.sfcraft.module.RoomModule;
 import io.ib67.sfcraft.util.Helper;
+import net.minecraft.server.players.NameAndId;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
@@ -41,9 +42,9 @@ public class PlayerSaveHandlerMixin {
         }
     }
 
-    @Redirect(at = @At(value = "FIELD", target = "Lnet/minecraft/world/level/storage/PlayerDataStorage;playerDir:Ljava/io/File;"), method = "load(Lnet/minecraft/world/entity/player/Player;Ljava/lang/String;)Ljava/util/Optional;")
-    private File sf$saveGetPlayerFolder(PlayerDataStorage instance, Player player) {
-        if (RoomModule.isVirtual(player.getUUID())) {
+    @Redirect(at = @At(value = "FIELD", target = "Lnet/minecraft/world/level/storage/PlayerDataStorage;playerDir:Ljava/io/File;"), method = "Lnet/minecraft/world/level/storage/PlayerDataStorage;load(Lnet/minecraft/server/players/NameAndId;Ljava/lang/String;)Ljava/util/Optional;")
+    private File sf$saveGetPlayerFolder(PlayerDataStorage instance, NameAndId player) {
+        if (RoomModule.isVirtual(player.id())) {
             return virtualPlayerFolder;
         } else {
             return this.playerDir;
diff --git a/src/main/java/io/ib67/sfcraft/module/command/BackModule.java b/src/main/java/io/ib67/sfcraft/module/command/BackModule.java
index 78a6a33..f0b81a9 100644
--- a/src/main/java/io/ib67/sfcraft/module/command/BackModule.java
+++ b/src/main/java/io/ib67/sfcraft/module/command/BackModule.java
@@ -27,14 +27,14 @@ public class BackModule extends ServerModule {
     private void registerCommands(CommandDispatcher<CommandSourceStack> dispatcher, CommandBuildContext registryAccess, Commands.CommandSelection registrationEnvironment) {
         dispatcher.register(LiteralArgumentBuilder.<CommandSourceStack>literal("back")
                 .requires(it -> this.isEnabled())
-                .requires(it -> it.getPlayer() != null)
-                .requires(it -> it.getPlayer().getLastDeathLocation().isPresent())
+                .requires(it -> it.getPlayer() != null && it.getPlayer().getLastDeathLocation().isPresent())
                 .requires(it -> SFConsts.COMMAND_BACK.hasPermission(it.getPlayer()))
                 .executes(this::onBack));
     }
 
     public int onBack(CommandContext<CommandSourceStack> it) {
         var player = it.getSource().getPlayer();
+        if (player == null) return 0;
         var pos = player.getLastDeathLocation().get();
         var wld = player.level().getServer().getLevel(pos.dimension());
         var _pos = pos.pos();
diff --git a/src/main/java/io/ib67/sfcraft/module/command/ManagementModule.java b/src/main/java/io/ib67/sfcraft/module/command/ManagementModule.java
index 80c2293..a326ab3 100644
--- a/src/main/java/io/ib67/sfcraft/module/command/ManagementModule.java
+++ b/src/main/java/io/ib67/sfcraft/module/command/ManagementModule.java
@@ -72,7 +72,7 @@ public class ManagementModule extends ServerModule {
                 var city = geoIPService.cityOf(addr);
                 src.sendSystemMessage(
                         Component.literal(" - ")
-                                .append(Component.literal("[" + city.getName() + "] ").withColor(CommonColors.BLUE))
+                                .append(Component.literal("[" + city.name() + "] ").withColor(CommonColors.BLUE))
                                 .append(Component.literal(serverPlayerEntity.getName().tryCollapseToString()))
                                 .append(Component.literal(" (" + Helper.hideIp(addr) + ")").withColor(CommonColors.LIGHT_GRAY))
                 );
diff --git a/src/main/java/io/ib67/sfcraft/module/room/CreativeRoomModule.java b/src/main/java/io/ib67/sfcraft/module/room/CreativeRoomModule.java
index 8b02eed..004b46a 100644
--- a/src/main/java/io/ib67/sfcraft/module/room/CreativeRoomModule.java
+++ b/src/main/java/io/ib67/sfcraft/module/room/CreativeRoomModule.java
@@ -34,6 +34,7 @@ import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.util.CommonColors;
 import net.minecraft.world.level.GameType;
+import net.minecraft.world.level.gamerules.GameRules;
 import org.jetbrains.annotations.NotNull;
 
 import java.awt.*;
diff --git a/src/main/java/io/ib67/sfcraft/module/supervisor/WebHandler.java b/src/main/java/io/ib67/sfcraft/module/supervisor/WebHandler.java
index ba1355f..9e1e5ac 100644
--- a/src/main/java/io/ib67/sfcraft/module/supervisor/WebHandler.java
+++ b/src/main/java/io/ib67/sfcraft/module/supervisor/WebHandler.java
@@ -2,7 +2,8 @@ package io.ib67.sfcraft.module.supervisor;
 
 import io.ib67.sfcraft.ServerModule;
 import io.javalin.Javalin;
+import io.javalin.config.JavalinConfig;
 
 public abstract class WebHandler extends ServerModule {
-    protected abstract void register(Javalin javalin);
+    protected abstract void register(JavalinConfig javalin);
 }
diff --git a/src/main/java/io/ib67/sfcraft/module/supervisor/WebModule.java b/src/main/java/io/ib67/sfcraft/module/supervisor/WebModule.java
index f45e0eb..8cce57d 100644
--- a/src/main/java/io/ib67/sfcraft/module/supervisor/WebModule.java
+++ b/src/main/java/io/ib67/sfcraft/module/supervisor/WebModule.java
@@ -17,13 +17,14 @@ public class WebModule extends ServerModule {
 
     @Override
     public void onEnable() {
-        javalin = Javalin.create(cfg -> cfg.useVirtualThreads = false);
         var moduleManager = SFCraft.getInjector().getInstance(ModuleManager.class);
-        for (ServerModule module : moduleManager.getModules()) {
-            if(module instanceof WebHandler webHandler) {
-                webHandler.register(javalin);
+        javalin = Javalin.create(cfg -> {
+            for (ServerModule module : moduleManager.getModules()) {
+                if(module instanceof WebHandler webHandler) {
+                    webHandler.register(cfg);
+                }
             }
-        }
+        });
         Thread.ofVirtual().name("SFCraft API Web").start(() -> javalin.start(config.httpPort));
     }
 
diff --git a/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java b/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java
index a72c64f..c82c99d 100644
--- a/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java
+++ b/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java
@@ -9,10 +9,9 @@ import io.ib67.sfcraft.inject.MinecraftServerSupplier;
 import io.ib67.sfcraft.module.SignatureService;
 import io.ib67.sfcraft.module.supervisor.WebHandler;
 import io.ib67.sfcraft.util.Helper;
-import io.ib67.sfcraft.util.Permission;
 import io.ib67.sfcraft.util.SFConsts;
 import io.ib67.sfcraft.util.litematic.LitematicConverterV3;
-import io.javalin.Javalin;
+import io.javalin.config.JavalinConfig;
 import io.javalin.http.Context;
 import io.javalin.http.UploadedFile;
 import io.netty.buffer.Unpooled;
@@ -75,8 +74,8 @@ public class SchematicUploader extends WebHandler {
     }
 
     @Override
-    public void register(Javalin javalin) {
-        javalin.options("/api/schematics/{name}", this::onUploadOptions).put("/api/schematics/{name}", this::uploadSchematic);
+    public void register(JavalinConfig javalin) {
+        javalin.routes.options("/api/schematics/{name}", this::onUploadOptions).put("/api/schematics/{name}", this::uploadSchematic);
     }
 
     public String generateSchematicUrl(String issuer) {
diff --git a/src/main/java/io/ib67/sfcraft/util/Permission.java b/src/main/java/io/ib67/sfcraft/util/Permission.java
index bc6434e..2ad2fe9 100644
--- a/src/main/java/io/ib67/sfcraft/util/Permission.java
+++ b/src/main/java/io/ib67/sfcraft/util/Permission.java
@@ -15,6 +15,7 @@ public record Permission<T extends Entity>(String key, boolean byDefault) {
     }
 
     public boolean hasPermission(T t) {
+        if(t == null) return false;
         if (check(t, SFConsts.SPECIAL_SUDO)) return true;
         if (byDefault) {
             return !check(t, "-"+key);
@@ -23,6 +24,7 @@ public record Permission<T extends Entity>(String key, boolean byDefault) {
     }
 
     private boolean check(T t, String permission){
+        if(t == null) return false;
         if(t instanceof Player player) {
             if (player.entityTags().contains(permission)){
                 return true;
diff --git a/src/main/resources/sfcraft.mixins.json b/src/main/resources/sfcraft.mixins.json
index e6c7ecc..6964728 100644
--- a/src/main/resources/sfcraft.mixins.json
+++ b/src/main/resources/sfcraft.mixins.json
@@ -13,7 +13,6 @@
     "common.PlayerEntityMixin",
     "common.ZombieMixin",
     "common.bridge.EntityBridge",
-    "common.bridge.ItemBridge",
     "common.bridge.ServerChunkManagerBridge",
     "common.bridge.ServerPlayerBridge",
     "common.bridge.ServerWorldBridge",