diff --git a/README.md b/README.md
index acd8859..ec0de8e 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,8 @@ public class ExampleCommand extends PaperCommand {
         addSyntax((context) -> {
             context.getSource().getBukkitSender().sendMessage("Woah!!!!");
             String arg = context.getArgument("message", String.class);
-            context.getSource().getBukkitSender().sendMessage(MiniMessage.miniMessage().deserialize(arg));
+            context.getSource().getBukkitSender()
+                .sendMessage(MiniMessage.miniMessage().deserialize(arg));
         }, stringArg("message"));
     }
 }
diff --git a/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitCommand.java b/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitCommand.java
index c410fa9..75ca8d6 100644
--- a/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitCommand.java
+++ b/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitCommand.java
@@ -30,7 +30,7 @@ import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
-import net.william278.uniform.CommandUser;
+import net.william278.uniform.Uniform;
 import org.bukkit.command.CommandException;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.NotNull;
@@ -55,8 +55,8 @@ public class BukkitCommand extends BaseCommand<CommandSender> {
     }
 
     @NotNull
-    Impl getImpl() {
-        return new Impl(this);
+    Impl getImpl(@NotNull Uniform uniform) {
+        return new Impl(uniform, this);
     }
 
     static final class Impl extends org.bukkit.command.Command {
@@ -65,9 +65,9 @@ public class BukkitCommand extends BaseCommand<CommandSender> {
 
         private final CommandDispatcher<CommandSender> dispatcher = new CommandDispatcher<>();
 
-        public Impl(@NotNull BukkitCommand command) {
+        public Impl(@NotNull Uniform uniform, @NotNull BukkitCommand command) {
             super(command.getName());
-            this.dispatcher.register(command.createBuilder());
+            this.dispatcher.register(command.createBuilder(uniform));
             this.setDescription(command.getDescription());
             this.setAliases(command.getAliases());
         }
@@ -111,17 +111,10 @@ public class BukkitCommand extends BaseCommand<CommandSender> {
 
         @NotNull
         private String getInput(@NotNull String[] args) {
-            return args.length == 0 ? getName()
-                : "%s %s".formatted(getName(), String.join(" ", args));
+            return args.length == 0 ? getName() : "%s %s".formatted(getName(), String.join(" ", args));
         }
     }
 
-    @Override
-    @NotNull
-    protected CommandUser getUser(@NotNull Object user) {
-        return new BukkitCommandUser((CommandSender) user);
-    }
-
     @Override
     public void addSubCommand(@NotNull Command command) {
         addSubCommand(new BukkitCommand(command));
diff --git a/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitUniform.java b/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitUniform.java
index 693c0ea..7778250 100644
--- a/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitUniform.java
+++ b/bukkit/src/main/java/net/william278/uniform/bukkit/BukkitUniform.java
@@ -21,10 +21,14 @@
 
 package net.william278.uniform.bukkit;
 
+import lombok.Getter;
+import lombok.Setter;
 import net.kyori.adventure.platform.bukkit.BukkitAudiences;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
+import net.william278.uniform.CommandUser;
 import net.william278.uniform.Uniform;
+import org.bukkit.command.CommandSender;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
 import space.arim.morepaperlib.MorePaperLib;
@@ -32,6 +36,7 @@ import space.arim.morepaperlib.commands.CommandRegistration;
 
 import java.util.Arrays;
 import java.util.Locale;
+import java.util.function.Function;
 
 /**
  * A class for registering commands with the Bukkit server's CommandMap
@@ -47,6 +52,10 @@ public final class BukkitUniform implements Uniform {
 
     private final CommandRegistration registrar;
 
+    @Getter
+    @Setter
+    Function<Object, CommandUser> commandUserSupplier = (user) -> new BukkitCommandUser((CommandSender) user);
+
     private BukkitUniform(@NotNull JavaPlugin plugin) {
         PLUGIN = plugin;
         this.registrar = new MorePaperLib(plugin).commandRegistration();
@@ -81,7 +90,8 @@ public final class BukkitUniform implements Uniform {
     public final <S, T extends BaseCommand<S>> void register(T... commands) {
         registrar.getServerCommandMap().registerAll(
             PLUGIN.getName().toLowerCase(Locale.ENGLISH).replaceAll("[^a-z0-9_]", ""),
-            Arrays.stream(commands).map(c -> (org.bukkit.command.Command) ((BukkitCommand) c).getImpl()).toList()
+            Arrays.stream(commands).map(c -> (BukkitCommand) c)
+                .map(c -> (org.bukkit.command.Command) c.getImpl(this)).toList()
         );
     }
 
diff --git a/common/src/main/java/net/william278/uniform/BaseCommand.java b/common/src/main/java/net/william278/uniform/BaseCommand.java
index 42c4bd4..fec0a34 100644
--- a/common/src/main/java/net/william278/uniform/BaseCommand.java
+++ b/common/src/main/java/net/william278/uniform/BaseCommand.java
@@ -48,6 +48,7 @@ public abstract class BaseCommand<S> {
     private Predicate<S> condition;
     @Nullable
     private CommandExecutor<S> defaultExecutor;
+    private Uniform uniform;
     private final List<CommandSyntax<S>> syntaxes = new ArrayList<>();
     private final List<BaseCommand<S>> subCommands = new ArrayList<>();
 
@@ -58,7 +59,8 @@ public abstract class BaseCommand<S> {
         command.provide(this);
     }
 
-    public BaseCommand(@NotNull String name, @NotNull String description, @NotNull List<String> aliases) {
+    public BaseCommand(@NotNull String name, @NotNull String description,
+                       @NotNull List<String> aliases) {
         this.name = name;
         this.aliases = aliases;
         this.description = description;
@@ -69,7 +71,9 @@ public abstract class BaseCommand<S> {
     }
 
     @NotNull
-    protected abstract CommandUser getUser(@NotNull Object user);
+    public final CommandUser getUser(@NotNull Object user) {
+        return uniform.getCommandUserSupplier().apply(user);
+    }
 
     public final void setCondition(@NotNull Predicate<S> condition) {
         this.condition = condition;
@@ -107,12 +111,14 @@ public abstract class BaseCommand<S> {
     public abstract void addSubCommand(@NotNull Command command);
 
     @NotNull
-    public final LiteralCommandNode<S> build() {
+    public final LiteralCommandNode<S> build(@NotNull Uniform uniform) {
+        this.uniform = uniform;
         return Graph.create(this).build();
     }
 
     @NotNull
-    public final LiteralArgumentBuilder<S> createBuilder() {
+    public final LiteralArgumentBuilder<S> createBuilder(@NotNull Uniform uniform) {
+        this.uniform = uniform;
         return Graph.create(this).literal(this.name);
     }
 
diff --git a/common/src/main/java/net/william278/uniform/Uniform.java b/common/src/main/java/net/william278/uniform/Uniform.java
index d0883ba..8300975 100644
--- a/common/src/main/java/net/william278/uniform/Uniform.java
+++ b/common/src/main/java/net/william278/uniform/Uniform.java
@@ -21,6 +21,10 @@
 
 package net.william278.uniform;
 
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Function;
+
 public interface Uniform {
 
     void register(Command... commands);
@@ -28,4 +32,9 @@ public interface Uniform {
     @SuppressWarnings("unchecked")
     <S, T extends BaseCommand<S>> void register(T... commands);
 
+    @NotNull
+    Function<Object, CommandUser> getCommandUserSupplier();
+
+    void setCommandUserSupplier(@NotNull Function<Object, CommandUser> supplier);
+
 }
diff --git a/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricCommand.java b/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricCommand.java
index 8488b7e..185a329 100644
--- a/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricCommand.java
+++ b/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricCommand.java
@@ -31,7 +31,6 @@ import net.minecraft.util.Identifier;
 import net.minecraft.util.InvalidIdentifierException;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
-import net.william278.uniform.CommandUser;
 import net.william278.uniform.element.ArgumentElement;
 import org.jetbrains.annotations.NotNull;
 
@@ -79,15 +78,8 @@ public class FabricCommand extends BaseCommand<ServerCommandSource> {
         });
     }
 
-    @Override
-    @NotNull
-    protected CommandUser getUser(@NotNull Object user) {
-        return new FabricCommandUser((ServerCommandSource) user);
-    }
-
     @Override
     public void addSubCommand(@NotNull Command command) {
         addSubCommand(new FabricCommand(command));
     }
-
 }
diff --git a/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricUniform.java b/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricUniform.java
index c5ef156..5eb038e 100644
--- a/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricUniform.java
+++ b/fabric-1.20.1/src/main/java/net/william278/uniform/fabric/FabricUniform.java
@@ -22,14 +22,19 @@
 package net.william278.uniform.fabric;
 
 import com.google.common.collect.Sets;
+import lombok.Getter;
+import lombok.Setter;
 import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
+import net.minecraft.server.command.ServerCommandSource;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
+import net.william278.uniform.CommandUser;
 import net.william278.uniform.Uniform;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
 import java.util.Set;
+import java.util.function.Function;
 
 /**
  * A class for registering commands with the Fabric (1.20.1) server
@@ -43,9 +48,13 @@ public final class FabricUniform implements Uniform {
 
     private final Set<FabricCommand> commands = Sets.newHashSet();
 
+    @Getter
+    @Setter
+    Function<Object, CommandUser> commandUserSupplier = (user) -> new FabricCommandUser((ServerCommandSource) user);
+
     private FabricUniform() {
         CommandRegistrationCallback.EVENT.register((dispatcher, registry, environment) ->
-            commands.forEach(command -> dispatcher.register(command.createBuilder()))
+            commands.forEach(command -> dispatcher.register(command.createBuilder(this)))
         );
     }
 
diff --git a/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricCommand.java b/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricCommand.java
index d17108e..96e967f 100644
--- a/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricCommand.java
+++ b/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricCommand.java
@@ -31,7 +31,6 @@ import net.minecraft.util.Identifier;
 import net.minecraft.util.InvalidIdentifierException;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
-import net.william278.uniform.CommandUser;
 import net.william278.uniform.element.ArgumentElement;
 import org.jetbrains.annotations.NotNull;
 
@@ -48,7 +47,8 @@ public class FabricCommand extends BaseCommand<ServerCommandSource> {
         super(name, aliases);
     }
 
-    public FabricCommand(@NotNull String name, @NotNull String description, @NotNull List<String> aliases) {
+    public FabricCommand(@NotNull String name, @NotNull String description,
+                         @NotNull List<String> aliases) {
         super(name, description, aliases);
     }
 
@@ -79,12 +79,6 @@ public class FabricCommand extends BaseCommand<ServerCommandSource> {
         });
     }
 
-    @Override
-    @NotNull
-    protected CommandUser getUser(@NotNull Object user) {
-        return new FabricCommandUser((ServerCommandSource) user);
-    }
-
     @Override
     public void addSubCommand(@NotNull Command command) {
         addSubCommand(new FabricCommand(command));
diff --git a/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricUniform.java b/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricUniform.java
index 4f4c9a3..aa91316 100644
--- a/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricUniform.java
+++ b/fabric-1.20.6/src/main/java/net/william278/uniform/fabric/FabricUniform.java
@@ -22,14 +22,19 @@
 package net.william278.uniform.fabric;
 
 import com.google.common.collect.Sets;
+import lombok.Getter;
+import lombok.Setter;
 import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
+import net.minecraft.server.command.ServerCommandSource;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
+import net.william278.uniform.CommandUser;
 import net.william278.uniform.Uniform;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
 import java.util.Set;
+import java.util.function.Function;
 
 /**
  * A class for registering commands with the Fabric (1.20.6) server
@@ -43,9 +48,13 @@ public final class FabricUniform implements Uniform {
 
     private final Set<FabricCommand> commands = Sets.newHashSet();
 
+    @Getter
+    @Setter
+    Function<Object, CommandUser> commandUserSupplier = (user) -> new FabricCommandUser((ServerCommandSource) user);
+
     private FabricUniform() {
         CommandRegistrationCallback.EVENT.register((dispatcher, registry, environment) ->
-            commands.forEach(command -> dispatcher.register(command.createBuilder()))
+            commands.forEach(command -> dispatcher.register(command.createBuilder(this)))
         );
     }
 
diff --git a/paper/src/main/java/net/william278/uniform/paper/LegacyPaperCommand.java b/paper/src/main/java/net/william278/uniform/paper/LegacyPaperCommand.java
index 43658d8..61267a8 100644
--- a/paper/src/main/java/net/william278/uniform/paper/LegacyPaperCommand.java
+++ b/paper/src/main/java/net/william278/uniform/paper/LegacyPaperCommand.java
@@ -38,10 +38,15 @@ import org.jetbrains.annotations.NotNull;
 import java.util.List;
 import java.util.Locale;
 import java.util.Set;
+import java.util.function.Function;
 
 @SuppressWarnings({"removal", "deprecation", "UnstableApiUsage"})
 public class LegacyPaperCommand extends BaseCommand<BukkitBrigadierCommandSource> {
 
+    static final Function<Object, CommandUser> USER_SUPPLIER = (user) -> new LegacyPaperCommandUser(
+        (BukkitBrigadierCommandSource) user
+    );
+
     public LegacyPaperCommand(@NotNull Command command) {
         super(command);
     }
@@ -54,12 +59,6 @@ public class LegacyPaperCommand extends BaseCommand<BukkitBrigadierCommandSource
         super(name, description, aliases);
     }
 
-    @Override
-    @NotNull
-    protected CommandUser getUser(@NotNull Object user) {
-        return new LegacyPaperCommandUser((BukkitBrigadierCommandSource) user);
-    }
-
     @Override
     public void addSubCommand(@NotNull Command command) {
         addSubCommand(new LegacyPaperCommand(command));
@@ -67,6 +66,8 @@ public class LegacyPaperCommand extends BaseCommand<BukkitBrigadierCommandSource
 
     @AllArgsConstructor
     static class Registrar implements Listener {
+        @NotNull
+        private final PaperUniform uniform;
         @NotNull
         private final JavaPlugin plugin;
         @NotNull
@@ -76,7 +77,7 @@ public class LegacyPaperCommand extends BaseCommand<BukkitBrigadierCommandSource
         public void commandRegisterEvent(CommandRegisteredEvent<BukkitBrigadierCommandSource> event) {
             commands.forEach(command -> {
                 // Register root command
-                final LiteralCommandNode<BukkitBrigadierCommandSource> built = command.build();
+                final LiteralCommandNode<BukkitBrigadierCommandSource> built = command.build(uniform);
                 event.getRoot().addChild(built);
 
                 // Register aliases
diff --git a/paper/src/main/java/net/william278/uniform/paper/PaperCommand.java b/paper/src/main/java/net/william278/uniform/paper/PaperCommand.java
index 8d86bbd..d210f7a 100644
--- a/paper/src/main/java/net/william278/uniform/paper/PaperCommand.java
+++ b/paper/src/main/java/net/william278/uniform/paper/PaperCommand.java
@@ -37,10 +37,15 @@ import org.jetbrains.annotations.NotNull;
 import java.util.Collection;
 import java.util.List;
 import java.util.Set;
+import java.util.function.Function;
 
 @SuppressWarnings({"unused", "UnstableApiUsage"})
 public class PaperCommand extends BaseCommand<CommandSourceStack> {
 
+    static final Function<Object, CommandUser> USER_SUPPLIER = (user) -> new PaperCommandUser(
+        (CommandSourceStack) user
+    );
+
     public PaperCommand(@NotNull Command command) {
         super(command);
     }
@@ -53,11 +58,12 @@ public class PaperCommand extends BaseCommand<CommandSourceStack> {
         super(name, description, aliases);
     }
 
-    static void register(@NotNull JavaPlugin plugin, @NotNull Set<PaperCommand> commands) {
+    static void register(@NotNull PaperUniform uniform, @NotNull JavaPlugin plugin,
+                         @NotNull Set<PaperCommand> commands) {
         plugin.getLifecycleManager().registerEventHandler(LifecycleEvents.COMMANDS, (event) -> {
             commands.forEach(command -> event.registrar().register(
                 plugin.getPluginMeta(),
-                command.build(),
+                command.build(uniform),
                 command.getDescription(),
                 command.getAliases()
             ));
@@ -101,12 +107,6 @@ public class PaperCommand extends BaseCommand<CommandSourceStack> {
         });
     }
 
-    @Override
-    @NotNull
-    protected CommandUser getUser(@NotNull Object user) {
-        return new PaperCommandUser((CommandSourceStack) user);
-    }
-
     @Override
     public void addSubCommand(@NotNull Command command) {
         addSubCommand(new PaperCommand(command));
diff --git a/paper/src/main/java/net/william278/uniform/paper/PaperUniform.java b/paper/src/main/java/net/william278/uniform/paper/PaperUniform.java
index 8924ea3..80f6001 100644
--- a/paper/src/main/java/net/william278/uniform/paper/PaperUniform.java
+++ b/paper/src/main/java/net/william278/uniform/paper/PaperUniform.java
@@ -22,14 +22,18 @@
 package net.william278.uniform.paper;
 
 import com.google.common.collect.Sets;
+import lombok.Getter;
+import lombok.Setter;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
+import net.william278.uniform.CommandUser;
 import net.william278.uniform.Uniform;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
 import java.util.Set;
+import java.util.function.Function;
 
 /**
  * A class for registering commands with the Paper server's command manager
@@ -42,26 +46,27 @@ public final class PaperUniform implements Uniform {
 
     private final Set<LegacyPaperCommand> legacyCommands = Sets.newHashSet();
     private final Set<PaperCommand> commands = Sets.newHashSet();
+    private final boolean useModernApi = isUseModernApi();
+
+    @Getter
+    @Setter
+    Function<Object, CommandUser> commandUserSupplier;
 
     private PaperUniform(@NotNull JavaPlugin plugin) {
-        if (isUseModernApi()) {
-            PaperCommand.register(plugin, commands);
+        // Modern (1.20.6+) Lifecycle event based Paper Brigadier API
+        if (useModernApi) {
+            this.commandUserSupplier = PaperCommand.USER_SUPPLIER;
+            PaperCommand.register(this, plugin, commands);
             return;
         }
+
+        // Legacy (1.17-1.20.4) event-based Paper Brigadier API
+        this.commandUserSupplier = LegacyPaperCommand.USER_SUPPLIER;
         plugin.getServer().getPluginManager().registerEvents(
-            new LegacyPaperCommand.Registrar(plugin, legacyCommands), plugin
+            new LegacyPaperCommand.Registrar(this, plugin, legacyCommands), plugin
         );
     }
 
-    private static boolean isUseModernApi() {
-        try {
-            Class.forName("io.papermc.paper.command.brigadier.CommandSourceStack");
-            return true;
-        } catch (ClassNotFoundException e) {
-            return false;
-        }
-    }
-
     /**
      * Get the PaperUniform instance for registering commands
      *
@@ -74,6 +79,15 @@ public final class PaperUniform implements Uniform {
         return INSTANCE != null ? INSTANCE : (INSTANCE = new PaperUniform(plugin));
     }
 
+    // Check if the modern Paper API is available
+    private static boolean isUseModernApi() {
+        try {
+            Class.forName("io.papermc.paper.command.brigadier.CommandSourceStack");
+            return true;
+        } catch (ClassNotFoundException e) {
+            return false;
+        }
+    }
 
     /**
      * Register a command with the server's command manager
@@ -103,7 +117,7 @@ public final class PaperUniform implements Uniform {
      * @since 1.0
      */
     public void register(@NotNull Command... commands) {
-        if (isUseModernApi()) {
+        if (useModernApi) {
             register(Arrays.stream(commands).map(PaperCommand::new).toArray(PaperCommand[]::new));
             return;
         }
diff --git a/velocity/src/main/java/net/william278/uniform/velocity/VelocityCommand.java b/velocity/src/main/java/net/william278/uniform/velocity/VelocityCommand.java
index a29bd52..af47b8b 100644
--- a/velocity/src/main/java/net/william278/uniform/velocity/VelocityCommand.java
+++ b/velocity/src/main/java/net/william278/uniform/velocity/VelocityCommand.java
@@ -30,7 +30,6 @@ import com.velocitypowered.api.proxy.ProxyServer;
 import com.velocitypowered.api.proxy.server.RegisteredServer;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
-import net.william278.uniform.CommandUser;
 import net.william278.uniform.element.ArgumentElement;
 import org.jetbrains.annotations.NotNull;
 
@@ -47,12 +46,13 @@ public class VelocityCommand extends BaseCommand<CommandSource> {
         super(name, aliases);
     }
 
-    public VelocityCommand(@NotNull String name, @NotNull String description, @NotNull List<String> aliases) {
+    public VelocityCommand(@NotNull String name, @NotNull String description,
+                           @NotNull List<String> aliases) {
         super(name, description, aliases);
     }
 
     public static ArgumentElement<CommandSource, RegisteredServer> server(ProxyServer server, String name,
-                                                                             SuggestionProvider<CommandSource> suggestionProvider) {
+                                                                          SuggestionProvider<CommandSource> suggestionProvider) {
         ArgumentType<RegisteredServer> argumentType = reader -> {
             String s = reader.readUnquotedString();
             RegisteredServer server1 = server.getServer(s).orElse(null);
@@ -74,7 +74,7 @@ public class VelocityCommand extends BaseCommand<CommandSource> {
     }
 
     public static ArgumentElement<CommandSource, CommandSource> source(ProxyServer server, String name,
-                                                                          SuggestionProvider<CommandSource> suggestionProvider) {
+                                                                       SuggestionProvider<CommandSource> suggestionProvider) {
         ArgumentType<CommandSource> argumentType = reader -> {
             String s = reader.readUnquotedString();
             CommandSource source = server.getPlayer(s).orElse(null);
@@ -95,12 +95,6 @@ public class VelocityCommand extends BaseCommand<CommandSource> {
         });
     }
 
-    @Override
-    @NotNull
-    protected CommandUser getUser(@NotNull Object user) {
-        return new VelocityCommandUser((CommandSource) user);
-    }
-
     @Override
     public void addSubCommand(@NotNull Command command) {
         addSubCommand(new VelocityCommand(command));
diff --git a/velocity/src/main/java/net/william278/uniform/velocity/VelocityUniform.java b/velocity/src/main/java/net/william278/uniform/velocity/VelocityUniform.java
index 41bb503..e2d6f93 100644
--- a/velocity/src/main/java/net/william278/uniform/velocity/VelocityUniform.java
+++ b/velocity/src/main/java/net/william278/uniform/velocity/VelocityUniform.java
@@ -22,13 +22,18 @@
 package net.william278.uniform.velocity;
 
 import com.velocitypowered.api.command.BrigadierCommand;
+import com.velocitypowered.api.command.CommandSource;
 import com.velocitypowered.api.proxy.ProxyServer;
+import lombok.Getter;
+import lombok.Setter;
 import net.william278.uniform.BaseCommand;
 import net.william278.uniform.Command;
+import net.william278.uniform.CommandUser;
 import net.william278.uniform.Uniform;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
+import java.util.function.Function;
 
 /**
  * A class for registering commands with the Velocity server's command manager
@@ -42,6 +47,10 @@ public final class VelocityUniform implements Uniform {
 
     private final ProxyServer server;
 
+    @Getter
+    @Setter
+    Function<Object, CommandUser> commandUserSupplier = (user) -> new VelocityCommandUser((CommandSource) user);
+
     private VelocityUniform(@NotNull ProxyServer server) {
         this.server = server;
     }
@@ -70,7 +79,7 @@ public final class VelocityUniform implements Uniform {
     @Override
     public final <S, T extends BaseCommand<S>> void register(T... commands) {
         Arrays.stream(commands).map(c -> (VelocityCommand) c).forEach(c -> server.getCommandManager()
-            .register(c.getName(), new BrigadierCommand(c.build())));
+            .register(c.getName(), new BrigadierCommand(c.build(this))));
     }
 
     /**