diff --git a/VpSharp.Commands/Attributes/AliasesAttribute.cs b/VpSharp.Commands/Attributes/AliasesAttribute.cs
index 9322285..57956c4 100644
--- a/VpSharp.Commands/Attributes/AliasesAttribute.cs
+++ b/VpSharp.Commands/Attributes/AliasesAttribute.cs
@@ -1,4 +1,6 @@
-namespace VpSharp.Commands.Attributes;
+using System.Collections.ObjectModel;
+
+namespace VpSharp.Commands.Attributes;
 
 /// <summary>
 ///     Defines the aliases of a command.
@@ -39,14 +41,15 @@ public sealed class AliasesAttribute : Attribute
             }
         }
 
-        Aliases = new string[aliases.Length + 1];
-        Aliases[0] = alias;
-        Array.Copy(aliases, 0, Aliases, 1, aliases.Length);
+        var buffer = new string[aliases.Length + 1];
+        buffer[0] = alias;
+        Array.Copy(aliases, 0, buffer, 1, aliases.Length);
+        Aliases = new ReadOnlyCollection<string>(buffer);
     }
 
     /// <summary>
     ///     Gets the command aliases.
     /// </summary>
     /// <value>The command aliases.</value>
-    public string[] Aliases { get; }
+    public IReadOnlyList<string> Aliases { get; }
 }
diff --git a/VpSharp.Commands/Command.cs b/VpSharp.Commands/Command.cs
index 09600f3..dc1e4e0 100644
--- a/VpSharp.Commands/Command.cs
+++ b/VpSharp.Commands/Command.cs
@@ -1,4 +1,5 @@
-using System.Reflection;
+using System.Collections.ObjectModel;
+using System.Reflection;
 
 namespace VpSharp.Commands;
 
@@ -10,7 +11,7 @@ public sealed class Command
     internal Command(string name, string[] aliases, MethodInfo method, CommandModule module)
     {
         Name = name;
-        Aliases = aliases[..];
+        Aliases = new ReadOnlyCollection<string>(aliases);
         Method = method;
         Module = module;
         Parameters = method.GetParameters()[1..];
@@ -20,7 +21,7 @@ public sealed class Command
     ///     Gets the aliases for this command.
     /// </summary>
     /// <value>The aliases.</value>
-    public string[] Aliases { get; }
+    public IReadOnlyList<string> Aliases { get; }
 
     /// <summary>
     ///     Gets the name of this command.
diff --git a/VpSharp.Commands/CommandContext.cs b/VpSharp.Commands/CommandContext.cs
index 4a83e13..fb6ed1f 100644
--- a/VpSharp.Commands/CommandContext.cs
+++ b/VpSharp.Commands/CommandContext.cs
@@ -1,4 +1,5 @@
-using System.Drawing;
+using System.Collections.ObjectModel;
+using System.Drawing;
 using VpSharp.Entities;
 
 namespace VpSharp.Commands;
@@ -18,7 +19,7 @@ public sealed class CommandContext
         CommandName = commandName;
         Alias = alias;
         RawArguments = rawArguments;
-        Arguments = rawArguments.Split();
+        Arguments = new ReadOnlyCollection<string>(rawArguments.Split());
     }
 
     /// <summary>
@@ -31,7 +32,7 @@ public sealed class CommandContext
     ///     Gets the arguments of the command.
     /// </summary>
     /// <value>The arguments passed by the avatar.</value>
-    public string[] Arguments { get; }
+    public IReadOnlyList<string> Arguments { get; }
 
     /// <summary>
     ///     Gets the avatar who executed the command.