diff --git a/lgtm.yml b/lgtm.yml
deleted file mode 100644
index 5f6799e..0000000
--- a/lgtm.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-path_classifiers:
-  library:
-    - libs/*.js
-    - libs/loaders/*.js
-  test:
-    - test
-    - sandbox
diff --git a/package-lock.json b/package-lock.json
index 993a6d5..0c8f335 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "online-3d-viewer",
-	"version": "0.8.20",
+	"version": "0.8.21",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "online-3d-viewer",
-			"version": "0.8.20",
+			"version": "0.8.21",
 			"license": "MIT",
 			"dependencies": {
 				"@simonwep/pickr": "1.8.2",
@@ -27,6 +27,7 @@
 				"jsdoc": "^3.6.11",
 				"mocha": "^10.2.0",
 				"oslllo-svg-fixer": "^2.2.0",
+				"rollup": "^3.9.1",
 				"run-python3": "^0.0.4",
 				"svgo": "^3.0.2"
 			}
@@ -4634,6 +4635,22 @@
 				"url": "https://github.com/sponsors/isaacs"
 			}
 		},
+		"node_modules/rollup": {
+			"version": "3.9.1",
+			"resolved": "https://registry.npmjs.org/rollup/-/rollup-3.9.1.tgz",
+			"integrity": "sha512-GswCYHXftN8ZKGVgQhTFUJB/NBXxrRGgO2NCy6E8s1rwEJ4Q9/VttNqcYfEvx4dTo4j58YqdC3OVztPzlKSX8w==",
+			"dev": true,
+			"bin": {
+				"rollup": "dist/bin/rollup"
+			},
+			"engines": {
+				"node": ">=14.18.0",
+				"npm": ">=8.0.0"
+			},
+			"optionalDependencies": {
+				"fsevents": "~2.3.2"
+			}
+		},
 		"node_modules/run-parallel": {
 			"version": "1.2.0",
 			"resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
@@ -8950,6 +8967,15 @@
 				"glob": "^7.1.3"
 			}
 		},
+		"rollup": {
+			"version": "3.9.1",
+			"resolved": "https://registry.npmjs.org/rollup/-/rollup-3.9.1.tgz",
+			"integrity": "sha512-GswCYHXftN8ZKGVgQhTFUJB/NBXxrRGgO2NCy6E8s1rwEJ4Q9/VttNqcYfEvx4dTo4j58YqdC3OVztPzlKSX8w==",
+			"dev": true,
+			"requires": {
+				"fsevents": "~2.3.2"
+			}
+		},
 		"run-parallel": {
 			"version": "1.2.0",
 			"resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
diff --git a/package.json b/package.json
index f1b9890..fe0a96a 100644
--- a/package.json
+++ b/package.json
@@ -4,8 +4,7 @@
 	"description": "Online 3D Viewer",
 	"license": "MIT",
 	"type": "module",
-	"main": "./build/o3dv.min.js",
-	"module": "./source/engine/main.js",
+	"main": "./build/o3dv.module.js",
 	"repository": "github:kovacsv/Online3DViewer",
 	"keywords": [
 		"3d",
@@ -32,6 +31,7 @@
 	],
 	"files": [
 		"build/o3dv.min.js",
+		"build/o3dv.module.js",
 		"source/engine/*",
 		"libs/loaders/*",
 		"website/assets/envmaps/*"
@@ -47,12 +47,13 @@
 		"update_engine_exports": "run-python3 tools/update_engine_exports.py",
 		"create_dist": "npm run create_package && npm run lint && npm run test",
 		"create_dist_test": "npm run create_package_test && npm run lint && npm run test",
-		"create_package": "npm run docs && npm run build_engine_prod && npm run build_website_prod && npm run build_css_prod && run-python3 tools/create_package.py",
-		"create_package_test": "npm run docs && npm run build_engine_prod && npm run build_website_prod && npm run build_css_prod && run-python3 tools/create_package.py test",
+		"create_package": "npm run docs && npm run build_engine_prod && npm run build_engine_module && npm run build_website_prod && npm run build_css_prod && run-python3 tools/create_package.py",
+		"create_package_test": "npm run docs && npm run build_engine_prod && npm run build_engine_module && npm run build_website_prod && npm run build_css_prod && run-python3 tools/create_package.py test",
 		"build_css_prod": "cleancss -o build/o3dv.website.min.css website/css/*",
 		"build_dev": "npm run build_engine_dev && npm run build_website_dev",
 		"build_engine_dev": "npm run update_engine_exports && esbuild source/engine/main.js --bundle --minify --global-name=OV --sourcemap --outfile=build/o3dv.min-dev.js",
 		"build_engine_prod": "npm run update_engine_exports && esbuild source/engine/main.js --bundle --minify --global-name=OV --outfile=build/o3dv.min.js",
+		"build_engine_module": "npm run update_engine_exports && rollup --config tools/rollup.js",
 		"build_website_dev": "esbuild source/website/index.js --bundle --minify --global-name=OV --sourcemap --outfile=build/o3dv.website.min-dev.js",
 		"build_website_prod": "esbuild source/website/index.js --bundle --minify --global-name=OV --outfile=build/o3dv.website.min.js"
 	},
@@ -66,6 +67,7 @@
 		"jsdoc": "^3.6.11",
 		"mocha": "^10.2.0",
 		"oslllo-svg-fixer": "^2.2.0",
+		"rollup": "^3.9.1",
 		"run-python3": "^0.0.4",
 		"svgo": "^3.0.2"
 	},
diff --git a/tools/rollup.js b/tools/rollup.js
new file mode 100644
index 0000000..afc34ae
--- /dev/null
+++ b/tools/rollup.js
@@ -0,0 +1,19 @@
+export default [
+    {
+        input: 'source/engine/main.js',
+        output: {
+            file: 'build/o3dv.module.js',
+            format: 'es'
+        },
+        external: [
+            'fflate',
+            'three',
+            'three/examples/jsm/loaders/SVGLoader.js',
+            'three/examples/jsm/loaders/TGALoader.js',
+            'three/examples/jsm/loaders/FBXLoader.js',
+            'three/examples/jsm/loaders/ColladaLoader.js',
+            'three/examples/jsm/loaders/VRMLLoader.js',
+            'three/examples/jsm/loaders/3MFLoader.js'
+        ]
+    }
+];