diff --git a/.circleci/config.yml b/.circleci/config.yml
index debb0fa..64e2fa0 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -13,7 +13,7 @@ commands:
     steps:
       - node/install-packages:
           pkg-manager: yarn
-          cache-version: v1-all
+          cache-version: v2-all
           cache-only-lockfile: true
           app-dir: ~/repo
           override-ci-command: yarn install --pure-lockfile --no-progress
@@ -27,6 +27,6 @@ jobs:
     steps:
       - checkout
       - install_deps
-      - run: yarn test
       - run: yarn type-check
       - run: yarn lint:ci
+      - run: yarn test
diff --git a/jest.config.mjs b/jest.config.mjs
new file mode 100644
index 0000000..6571e0f
--- /dev/null
+++ b/jest.config.mjs
@@ -0,0 +1,25 @@
+const ES_PACKAGES_TO_TRANSFORM = [];
+
+/** @type {import('jest').Config} */
+const config = {
+  collectCoverageFrom: ['src/**/*.ts', '!src/**/schema.ts', '!src/**/types.ts'],
+  reporters: ['default', 'jest-junit'],
+  transform: {
+    '^.+\\.(t|j)sx?$': [
+      '@swc/jest',
+      {
+        jsc: {
+          parser: {
+            syntax: 'typescript',
+          },
+        },
+      },
+    ],
+  },
+  resolver: 'ts-jest-resolver',
+  transformIgnorePatterns: [
+    `node_modules/(?!(${ES_PACKAGES_TO_TRANSFORM.join('|')}))/node_modules/.+\\.js`,
+  ],
+};
+
+export default config;
diff --git a/package.json b/package.json
index 6f9579e..ce225a6 100644
--- a/package.json
+++ b/package.json
@@ -15,15 +15,16 @@
     "email": "andrii.bakanov@shelf.io",
     "url": "https://shelf.io"
   },
-  "main": "lib",
+  "sideEffects": false,
+  "type": "module",
+  "exports": "./lib/index.js",
+  "module": "./lib/index.js",
   "types": "lib/index.d.ts",
   "files": [
     "lib"
   ],
   "scripts": {
-    "build": "rm -rf lib/ && yarn build:types && yarn build:code",
-    "build:code": "babel src --out-dir lib --ignore '**/*.test.ts' --extensions '.ts' && find ./lib -name '*.test.d.ts' -delete",
-    "build:types": "tsc --emitDeclarationOnly --declaration --isolatedModules false --declarationDir lib",
+    "build": "rm -rf lib/ && tsc",
     "coverage": "yarn test --coverage",
     "lint": "yarn lint:ci --fix",
     "lint:ci": "eslint . --quiet",
@@ -43,25 +44,23 @@
       ".husky/validate-circleci-config.sh"
     ]
   },
-  "babel": {
-    "extends": "@shelf/babel-config/backend"
-  },
   "prettier": "@shelf/prettier-config",
   "dependencies": {},
   "devDependencies": {
-    "@babel/cli": "7.26.4",
-    "@babel/core": "7.26.0",
-    "@shelf/babel-config": "3.0.0",
     "@shelf/eslint-config": "4.2.1",
     "@shelf/prettier-config": "1.0.0",
     "@shelf/tsconfig": "0.1.0",
+    "@swc/core": "1.4.11",
+    "@swc/jest": "0.2.36",
     "@types/jest": "29.5.14",
     "@types/node": "20",
     "eslint": "9.17.0",
     "husky": "9.1.7",
     "jest": "29.7.0",
+    "jest-junit": "16.0.0",
     "lint-staged": "15.3.0",
     "prettier": "3.4.2",
+    "ts-jest-resolver": "2.0.1",
     "typescript": "5.7.2"
   },
   "engines": {
diff --git a/src/evaluation.test.ts b/src/evaluation.test.ts
index 5c17197..d903ed3 100644
--- a/src/evaluation.test.ts
+++ b/src/evaluation.test.ts
@@ -1,5 +1,5 @@
-import type {Expression} from './types';
-import {evaluate} from './evaluation';
+import type {Expression} from './types.js';
+import {evaluate} from './evaluation.js';
 
 const baseExpression: Expression = {
   joiner: 'and',
diff --git a/src/evaluation.ts b/src/evaluation.ts
index 1fe470b..7a981c5 100644
--- a/src/evaluation.ts
+++ b/src/evaluation.ts
@@ -1,8 +1,5 @@
-import type {Expression} from './types';
-import type {JoinerParameters} from './types';
-import type {Rule, StackElement} from './types';
-import type {RuleParameters} from './types';
-import {validateJoinerInvoke, validateRuleInvoke} from './validations';
+import type {Expression, JoinerParameters, Rule, RuleParameters, StackElement} from './types.js';
+import {validateJoinerInvoke, validateRuleInvoke} from './validations.js';
 
 export const evaluate = ({
   expression,
diff --git a/src/index.test.ts b/src/index.test.ts
index f839cec..f62e604 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -1,7 +1,7 @@
-jest.mock('./evaluation');
+jest.mock('./evaluation.js');
 
-import {evaluate} from './evaluation';
-import {evaluateExpression} from './index';
+import {evaluate} from './evaluation.js';
+import {evaluateExpression} from './index.js';
 
 it('should return true', () => {
   jest.mocked(evaluate).mockReturnValue(true);
diff --git a/src/index.ts b/src/index.ts
index b404996..2f57453 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,5 @@
-import type {Expression, VariableWithValue} from './types';
-import {evaluate} from './evaluation';
+import type {Expression, VariableWithValue} from './types.js';
+import {evaluate} from './evaluation.js';
 
 export const evaluateExpression = (
   expression: Expression,
@@ -19,4 +19,4 @@ export const evaluateExpression = (
   return result;
 };
 
-export type {Expression, Rule} from './types';
+export type {Expression, Rule} from './types.js';
diff --git a/src/validations.test.ts b/src/validations.test.ts
index 1d97f00..07d7fac 100644
--- a/src/validations.test.ts
+++ b/src/validations.test.ts
@@ -1,4 +1,4 @@
-import {validateJoinerInvoke, validateRuleInvoke} from './validations';
+import {validateJoinerInvoke, validateRuleInvoke} from './validations.js';
 
 describe('validateJoinerInvoke', () => {
   it('should throw error if joiner is not SINGLE and left is undefined', () => {
diff --git a/src/validations.ts b/src/validations.ts
index 595f88b..76e5df4 100644
--- a/src/validations.ts
+++ b/src/validations.ts
@@ -1,4 +1,4 @@
-import type {Expression, JoinerParameters, Rule} from './types';
+import type {Expression, JoinerParameters, Rule} from './types.js';
 
 export const validateJoinerInvoke = ({
   joiner,
diff --git a/tsconfig.json b/tsconfig.json
index 5bbaf96..cfcc41c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,8 +1,12 @@
 {
   "extends": "@shelf/tsconfig/backend",
   "compilerOptions": {
-    "strict": true
+    "strict": true,
+    "module": "NodeNext",
+    "declaration": true,
+    "declarationMap": true,
+    "outDir": "lib"
   },
-  "exclude": ["node_modules"],
+  "exclude": ["node_modules", "**/*.test.*", "**/mocks.ts"],
   "include": ["src"]
 }