diff --git a/Modules/Basics/CoreExtensions.cs b/Modules/Basics/CoreExtensions.cs
index 83005414..5a9e0d1b 100644
--- a/Modules/Basics/CoreExtensions.cs
+++ b/Modules/Basics/CoreExtensions.cs
@@ -88,6 +88,7 @@ public static bool HasType(this IRequest request, params RequestMethod[] methods
             { "woff2", ContentType.FontWoff2 },
             // Scripts
             { "js", ContentType.ApplicationJavaScript },
+            { "mjs", ContentType.ApplicationJavaScript },
             // Images
             { "ico", ContentType.ImageIcon },
             { "gif", ContentType.ImageGif },