diff --git a/Sources/Generator/Generators/HTMLElementsGenerator.swift b/Sources/Generator/Generators/HTMLElementsGenerator.swift
index 942bfbc..9352d0e 100644
--- a/Sources/Generator/Generators/HTMLElementsGenerator.swift
+++ b/Sources/Generator/Generators/HTMLElementsGenerator.swift
@@ -99,8 +99,11 @@ struct HTMLElementsGenerator {
         """
     }
 
-    func scriptInclude(path: String) -> String {
-        "<script src=\"\(path)\"></script>"
+    func scriptInclude(path: String, asModule: Bool) -> String {
+        if asModule {
+            return "<script type=\"module\" src=\"\(path)\"></script>"
+        }
+        return "<script src=\"\(path)\"></script>"
     }
 
     func codeHighlightFooter() -> String {
diff --git a/Sources/Generator/Generators/PageHeadGenerator.swift b/Sources/Generator/Generators/PageHeadGenerator.swift
index a8a0ac1..8503931 100644
--- a/Sources/Generator/Generators/PageHeadGenerator.swift
+++ b/Sources/Generator/Generators/PageHeadGenerator.swift
@@ -38,12 +38,11 @@ struct PageHeadGenerator {
         content[.customPageContent] = results.getContentOfOptionalFile(at: page.additionalHeadContentPath, source: page.path)
 
         let head = (content[.customPageContent].unwrapped { [$0] } ?? []) + headers
-            .map { $0.rawValue }
-            .sorted()
+            .sorted { $0.rawValue < $1.rawValue }
             .map { option in
-                let scriptPath = "assets/js/\(option)"
+                let scriptPath = "assets/js/\(option.rawValue)"
                 let relative = page.relativePathToOtherSiteElement(file: scriptPath)
-                return factory.html.scriptInclude(path: relative)
+                return factory.html.scriptInclude(path: relative, asModule: option.asModule)
             }
 
         content[.customPageContent] = head.joined(separator: "\n")
diff --git a/Sources/Generator/Processing/RequiredHeaders.swift b/Sources/Generator/Processing/RequiredHeaders.swift
index 473da3b..f3a7702 100644
--- a/Sources/Generator/Processing/RequiredHeaders.swift
+++ b/Sources/Generator/Processing/RequiredHeaders.swift
@@ -3,6 +3,13 @@ import Foundation
 enum HeaderFile: String {
     case codeHightlighting = "highlight.js"
     case modelViewer = "model-viewer.js"
+
+    var asModule: Bool {
+        switch self {
+        case .codeHightlighting: return false
+        case .modelViewer: return true
+        }
+    }
 }
 
 typealias RequiredHeaders = Set<HeaderFile>