diff --git a/package-lock.json b/package-lock.json
index 610ff1f..5e71e0a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
         "svgtofont": "^6.0.0"
       },
       "bin": {
-        "gif": "dist/index.js"
+        "gif": "dist/index.mjs"
       },
       "devDependencies": {
         "@types/fs-extra": "^11.0.4",
diff --git a/package.json b/package.json
index 4e0af56..79fcba7 100644
--- a/package.json
+++ b/package.json
@@ -9,15 +9,15 @@
   },
   "license": "Apache-2.0",
   "bin": {
-    "@db-ui/gif": "dist/index.js"
+    "@db-ui/gif": "dist/index.mjs"
   },
-  "main": "index.js",
+  "main": "dist/index.mjs",
   "files": [
     "dist/"
   ],
   "scripts": {
     "build": "npm-run-all -p build:*",
-    "build:01_icon_fonts_common": "esbuild src/generate-icon-fonts/cli.ts --bundle --outfile=dist/index.js --platform=node --packages=external",
+    "build:01_icon_fonts_common": "esbuild src/generate-icon-fonts/cli.ts --bundle --outfile=dist/index.mjs --platform=node --packages=external --format=esm",
     "build:02_icon_fonts_styles": "cpr src/generate-icon-fonts/styles dist/styles -o",
     "build:03_icon_fonts_templates": "cpr src/generate-icon-fonts/templates dist/templates -o",
     "lint": "eslint src --ext ts",