diff --git a/ScriptCs.Engine.Mono/MonoModule.cs b/ScriptCs.Engine.Mono/MonoModule.cs
index a452bc1..643eb4b 100644
--- a/ScriptCs.Engine.Mono/MonoModule.cs
+++ b/ScriptCs.Engine.Mono/MonoModule.cs
@@ -3,13 +3,16 @@
 
 namespace ScriptCs.Engine.Mono
 {
-    [Module("mono", Extensions = "csx")]
+    [Module(ModuleName)]
     public class MonoModule : IModule
     {
+        public const string ModuleName = "mono";
+
         public void Initialize(IModuleConfiguration config)
         {
             Console.WriteLine("Mono Engine initialized!");
-            config.ScriptEngine<MonoScriptEngine>();
+            if (!config.Overrides.ContainsKey(typeof(IScriptEngine)))
+                config.ScriptEngine<MonoScriptEngine>();
         }
     }
 }
\ No newline at end of file