diff --git a/bukkittest/build.gradle.kts b/bukkittest/build.gradle.kts
index 545c292..e30be23 100644
--- a/bukkittest/build.gradle.kts
+++ b/bukkittest/build.gradle.kts
@@ -6,8 +6,8 @@ plugins {
 }
 
 server {
-    version = "1.20.1"
-    type = "paper"
+    version = "1.20.6"
+    type = "purpur"
 }
 
 repositories {
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/command/CommandManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/command/CommandManager.java
index 0e3638e..d6e99d0 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/command/CommandManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/command/CommandManager.java
@@ -36,13 +36,14 @@ public class CommandManager {
     public void execute(CommandSender sender, String name, String[] args) {
         Command command = this.commands.stream()
                 .filter(cmd -> cmd.getName().equalsIgnoreCase(name) && cmd.getArgs().size() == args.length)
-                .findFirst().orElse(null);
+                .findFirst()
+                .orElse(null);
 
         if (command == null) {
             sender.sendMessage(Component.text("Command not found.")); // TODO: change
             return;
         }
 
-        command.execute(this.plugin, sender, new Arguments(List.of(args)));
+        command.execute(this.plugin, sender, new Arguments(plugin, command, List.of(args)));
     }
 }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/command/abstraction/ParentCommand.java b/common/src/main/java/dev/xhyrom/lighteco/common/command/abstraction/ParentCommand.java
index 9363afb..2b64ae9 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/command/abstraction/ParentCommand.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/command/abstraction/ParentCommand.java
@@ -5,6 +5,7 @@ import dev.xhyrom.lighteco.common.command.argument.type.StringArgument;
 import dev.xhyrom.lighteco.common.model.chat.CommandSender;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import lombok.Getter;
+import net.kyori.adventure.text.Component;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -24,11 +25,12 @@ public class ParentCommand extends Command {
     public void execute(LightEcoPlugin plugin, CommandSender sender, Arguments args) {
         String childName = args.string("child");
         Command child = Arrays.stream(getChildren())
-                .filter(cmd -> cmd.getName().equalsIgnoreCase(childName))
+                .filter(cmd -> cmd.getName().equalsIgnoreCase(childName) && cmd.getArgs().size() == args.size() - 1)
                 .findFirst()
                 .orElse(null);
 
         if (child == null) {
+            sender.sendMessage(Component.text("Command not found. / Parent Command"));
             return;
         }
 
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/command/argument/Arguments.java b/common/src/main/java/dev/xhyrom/lighteco/common/command/argument/Arguments.java
index 00f9916..5720576 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/command/argument/Arguments.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/command/argument/Arguments.java
@@ -1,18 +1,28 @@
 package dev.xhyrom.lighteco.common.command.argument;
 
+import dev.xhyrom.lighteco.common.command.abstraction.Command;
 import dev.xhyrom.lighteco.common.model.user.User;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 public class Arguments {
+    private final LightEcoPlugin plugin;
+    private final Command command;
     private final List<String> arguments;
-    private final Map<String, ?> mappedArguments;
+    private final Map<String, Object> mappedArguments = new HashMap<>();
 
-    public Arguments(List<String> arguments) {
+    public Arguments(LightEcoPlugin plugin, Command command, List<String> arguments) {
+        this.plugin = plugin;
+        this.command = command;
         this.arguments = arguments;
 
-        this.mappedArguments = Map.of();
+        for (int i = 0; i < arguments.size(); i++) {
+            String arg = arguments.get(i);
+            this.mappedArguments.put(command.getArgs().get(i).getName(), (Object) command.getArgs().get(i).parse(plugin, arg));
+        }
     }
 
     public String string(String name) {
@@ -35,7 +45,11 @@ public class Arguments {
         return (String) this.arguments.get(index);
     }
 
+    public int size() {
+        return this.arguments.size();
+    }
+
     public Arguments subList(int fromIndex) {
-        return new Arguments(this.arguments.subList(fromIndex, this.arguments.size()));
+        return new Arguments(this.plugin, this.command, this.arguments.subList(fromIndex, this.arguments.size()));
     }
 }
diff --git a/sponge-8/src/main/java/dev/xhyrom/lighteco/sponge/SpongeLightEcoBootstrap.java b/sponge-8/src/main/java/dev/xhyrom/lighteco/sponge/SpongeLightEcoBootstrap.java
index ab281f0..4c5c55a 100644
--- a/sponge-8/src/main/java/dev/xhyrom/lighteco/sponge/SpongeLightEcoBootstrap.java
+++ b/sponge-8/src/main/java/dev/xhyrom/lighteco/sponge/SpongeLightEcoBootstrap.java
@@ -12,6 +12,7 @@ import org.spongepowered.plugin.builtin.jvm.Plugin;
 import java.io.InputStream;
 import java.nio.file.Path;
 import java.util.List;
+import java.util.Optional;
 import java.util.UUID;
 
 @Plugin("lighteco-sponge")
@@ -60,6 +61,11 @@ public class SpongeLightEcoBootstrap implements LightEcoBootstrap, LoaderBootstr
         return null;
     }
 
+    @Override
+    public Optional<UUID> lookupUniqueId(String username) {
+        return Optional.empty();
+    }
+
     @Override
     public boolean isPlayerOnline(UUID uniqueId) {
         return false;