diff --git a/package.json b/package.json
index 25af486..f7fd8f0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "export-from-json",
-  "version": "1.6.0",
+  "version": "1.7.0",
   "description": "Export to txt, json, csv, xls, xml format file from valid JavaScript JSON object.",
   "keywords": [
     "json",
@@ -10,6 +10,7 @@
     "excel",
     "typescript"
   ],
+  "type": "module",
   "main": "dist/umd/index.js",
   "module": "dist/esm/index.js",
   "typings": "dist/types/index.d.ts",
@@ -59,8 +60,17 @@
     "typescript": "^4.6.2"
   },
   "jest": {
+    "extensionsToTreatAsEsm": [".ts"],
+    "moduleNameMapper": {
+      "^(\\.{1,2}/.*)\\.js$": "$1"
+    },
     "transform": {
-      "^.+\\.ts$": "ts-jest"
+      "^.+\\.ts$": [
+        "ts-jest",
+        {
+          "useESM": true
+        }
+      ]
     },
     "testRegex": "/__tests__/.+\\.spec.ts$",
     "moduleFileExtensions": [
diff --git a/src/converters.ts b/src/converters.ts
index 0013f61..7f257ef 100644
--- a/src/converters.ts
+++ b/src/converters.ts
@@ -1,4 +1,4 @@
-import { isArray, getEntries, normalizeXMLName, indent, stripHTML, assert, getKeys } from './utils'
+import { isArray, getEntries, normalizeXMLName, indent, stripHTML, assert, getKeys } from './utils.js'
 
 export function _createFieldsMapper (fields?: string[] | Record<string, string>) {
   if (
@@ -106,7 +106,8 @@ export function _createTableEntries (
 
 // Rule: Fields that contain commas must begin and end with double quotes.
 // Addition Rule: Fields that contain double quotes must begin and end with double quotes.
-// Rule: Fields that contain line breaks must begin and end with double quotes (not all programs support values with line breaks).
+// Rule: Fields that contain line breaks must begin and end with double quotes
+//       (not all programs support values with line breaks).
 // Rule: All other fields do not require double quotes.
 // Rule: Double quotes within values are represented by two contiguous double quotes.
 function encloser (value: string) {
diff --git a/src/exportFromJSON.ts b/src/exportFromJSON.ts
index e896d30..32bdb83 100644
--- a/src/exportFromJSON.ts
+++ b/src/exportFromJSON.ts
@@ -1,7 +1,7 @@
-import { assert, isArray, normalizeFileName } from './utils'
-import { downloadFile } from './processors'
-import { _prepareData, _createJSONData, createCSVData, createXLSData, createXMLData, _createFieldsMapper } from './converters'
-import { exportTypes, ExportType } from './types'
+import { assert, isArray, normalizeFileName } from './utils.js'
+import { downloadFile } from './processors.js'
+import { _prepareData, _createJSONData, createCSVData, createXLSData, createXMLData, _createFieldsMapper } from './converters.js'
+import { exportTypes, ExportType } from './types.js'
 export interface IOption<R = void> {
   data: object | string
   fileName?: string
diff --git a/src/index.ts b/src/index.ts
index 8edf6cf..de741cf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,5 @@
-import exportFromJSON from './exportFromJSON'
-import type { ExportType } from './types'
+import exportFromJSON from './exportFromJSON.js'
+import type { ExportType } from './types.js'
 
 export type { ExportType }
 export default exportFromJSON
diff --git a/src/processors.ts b/src/processors.ts
index 8347470..02174e6 100644
--- a/src/processors.ts
+++ b/src/processors.ts
@@ -1,4 +1,4 @@
-import type { ExportType } from './types'
+import type { ExportType } from './types.js'
 
 export function generateDataURI (content: string, type: ExportType, byBlob: boolean): string {
   switch (type) {