diff --git a/.changeset/eighty-tomatoes-greet.md b/.changeset/eighty-tomatoes-greet.md
new file mode 100644
index 0000000..ce87050
--- /dev/null
+++ b/.changeset/eighty-tomatoes-greet.md
@@ -0,0 +1,5 @@
+---
+'@codota/token.js': minor
+---
+
+esm build
diff --git a/package.json b/package.json
index a9fe07c..98e896f 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   },
   "packageManager": "pnpm@8.6.12",
   "description": "Integrate 9 LLM providers with a single Typescript SDK using OpenAIs format.",
-  "main": "dist/index.cjs",
+  "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "type": "module",
   "files": [
diff --git a/scripts/build.ts b/scripts/build.ts
index 9e74d5b..bcc17d5 100644
--- a/scripts/build.ts
+++ b/scripts/build.ts
@@ -7,8 +7,8 @@ const build = async () => {
       entryPoints: ['src/index.ts'],
       bundle: true,
       minify: true,
-      format: 'cjs',
-      outfile: `./dist/index.cjs`,
+      format: 'esm',
+      outfile: `./dist/index.js`,
       platform: 'node',
       treeShaking: true,
       tsconfig: 'tsconfig.json',
diff --git a/tsconfig.json b/tsconfig.json
index 1b8fee4..631b0a6 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -16,7 +16,7 @@
     "rootDir": "./src",
     "skipLibCheck": true,
     "sourceMap": true,
-    "target": "ES2015",
+    "target": "ES2020",
     "typeRoots": [
       "node_modules/@types"
     ]