diff --git a/proxy/src/main/java/com/glyart/authmevelocity/proxy/listener/ProxyListener.java b/proxy/src/main/java/com/glyart/authmevelocity/proxy/listener/ProxyListener.java
index 8694eaf..a3b6e34 100644
--- a/proxy/src/main/java/com/glyart/authmevelocity/proxy/listener/ProxyListener.java
+++ b/proxy/src/main/java/com/glyart/authmevelocity/proxy/listener/ProxyListener.java
@@ -3,6 +3,7 @@ package com.glyart.authmevelocity.proxy.listener;
 import com.glyart.authmevelocity.proxy.AuthmeVelocityAPI;
 import com.glyart.authmevelocity.proxy.config.AuthMeConfig;
 import com.glyart.authmevelocity.proxy.config.ConfigUtils;
+import com.glyart.authmevelocity.proxy.utils.AuthmeUtils;
 import com.velocitypowered.api.event.EventTask;
 import com.velocitypowered.api.event.Subscribe;
 import com.velocitypowered.api.event.command.CommandExecuteEvent;
@@ -32,12 +33,8 @@ public class ProxyListener {
             return;
 
         if(AuthmeVelocityAPI.isInAuthServer(player)){
-            var commandconfig = config.getCommandsConfig();
-            String command = event.getCommand();
-            if(command.contains(" ")){
-                command = command.split(" ")[0];
-            }
-            if(!commandconfig.getAllowedCommands().contains(command)){
+            String command = AuthmeUtils.getFirstArgument(event.getCommand());
+            if(!config.getCommandsConfig().getAllowedCommands().contains(command)){
                 ConfigUtils.sendBlockedMessage(player);
                 event.setResult(CommandExecuteEvent.CommandResult.denied());
             }
diff --git a/proxy/src/main/java/com/glyart/authmevelocity/proxy/utils/AuthmeUtils.java b/proxy/src/main/java/com/glyart/authmevelocity/proxy/utils/AuthmeUtils.java
new file mode 100644
index 0000000..2f329ad
--- /dev/null
+++ b/proxy/src/main/java/com/glyart/authmevelocity/proxy/utils/AuthmeUtils.java
@@ -0,0 +1,22 @@
+package com.glyart.authmevelocity.proxy.utils;
+
+import java.util.Objects;
+
+import org.jetbrains.annotations.NotNull;
+
+public class AuthmeUtils {
+    //Origin: https://github.com/4drian3d/ChatRegulator/blob/main/src/main/java/me/dreamerzero/chatregulator/utils/CommandUtils.java#L71
+    /**
+     * Get the first argument of a string
+     * @param string the string
+     * @return the first argument
+     */
+    public static @NotNull String getFirstArgument(@NotNull String string){
+        int index = Objects.requireNonNull(string).indexOf(" ");
+        if (index == -1) {
+            return string;
+        }
+        return string.substring(0, index);
+    }
+    private AuthmeUtils(){}
+}