diff --git a/README.md b/README.md
index 5cfd5db..1bb8b58 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ npm i node-stemmer
 
 | node-stemmer    | libstemmer |
 | -------- | ------- |
-| 3.0.0  | 3.0.0, 3.0.1    |
+| 3.0.2  | 3.0.0, 3.0.1    |
 | 1.0.0 | 2.0.0, 2.1.0, 2.2.0     |
 
 ## Usage
diff --git a/jest.config.js b/jest.config.js
index e946bca..4bde9f6 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -2,4 +2,15 @@
 export default {
   preset: 'ts-jest',
   testEnvironment: 'node',
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    "@src/(.*)": "<rootDir>/src/$1",
+    "^(..?/.+).js?$": "$1"
+  },
+  transformIgnorePatterns: ['node_modules'],
+  globals: { 
+    'ts-jest': { 
+      useESM: true 
+    } 
+  }
 };
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 84abb79..e56542f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "node-stemmer",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "node-stemmer",
-      "version": "3.0.0",
+      "version": "3.0.1",
       "license": "MIT",
       "dependencies": {
         "ffi-rs": "^1.2.10"
diff --git a/package.json b/package.json
index 9b64eea..91be8d7 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,9 @@
 {
   "name": "node-stemmer",
-  "version": "3.0.0",
+  "version": "3.0.2",
   "description": "A Node.js interface to the Snowball stemming algorithms",
   "main": "lib/index.js",
+  "module": "lib/index.js",
   "type": "module",
   "scripts": {
     "test": "jest",
diff --git a/src/index.ts b/src/index.ts
index 6865bd9..01d177c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,2 +1,2 @@
-export { default as Stemmer } from './stemmer';
-export { CharacterEncoding } from './enum/character-encoding';
\ No newline at end of file
+export { default as Stemmer } from './stemmer.js';
+export { CharacterEncoding } from './enum/character-encoding.js';
\ No newline at end of file
diff --git a/src/stemmer.ts b/src/stemmer.ts
index 039ec1d..b27ab4c 100644
--- a/src/stemmer.ts
+++ b/src/stemmer.ts
@@ -1,7 +1,7 @@
 import { isNullPointer } from "ffi-rs";
-import { Libstemmer } from "./libstemmer";
-import { UnavailableAlgorithmError } from "./error/unavailable-algorithm-error";
-import { CharacterEncoding } from "./enum/character-encoding";
+import { Libstemmer } from "./libstemmer.js";
+import { UnavailableAlgorithmError } from "./error/unavailable-algorithm-error.js";
+import { CharacterEncoding } from "./enum/character-encoding.js";
 
 export default class Stemmer {
 
diff --git a/tsconfig.json b/tsconfig.json
index 4a98bed..88fc73c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,6 +4,7 @@
       "module": "esnext",
       "declaration": true,
       "outDir": "./lib",
+      "rootDir": "./src",
       "strict": true,
       "moduleResolution": "node",
       "esModuleInterop": true