diff --git a/action.yml b/action.yml
index c37ccc1..b09ceb8 100644
--- a/action.yml
+++ b/action.yml
@@ -58,4 +58,4 @@ outputs:
     description: 'the generated release changelog'
 runs:
   using: 'node20'
-  main: 'dist/index.js'
+  main: 'dist/index.mjs'
diff --git a/dist/index.js b/dist/index.mjs
similarity index 100%
rename from dist/index.js
rename to dist/index.mjs
diff --git a/package.json b/package.json
index cb31276..db37331 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "scripts": {
     "test": "eslint src/** && tsc --noEmit ./src/index.ts",
     "fix": "eslint --fix src/**",
-    "build": "bun build ./src/index.js --target=node --outfile=dist/index.js",
+    "build": "bun build ./src/index.js --target=node --outfile=dist/index.mjs",
     "prepare": "husky"
   },
   "license": "MIT",