diff --git a/.gitignore b/.gitignore
index fc8299d..7e4fd53 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 lerna-debug.log*
+test
 
 # Directory for instrumented libs generated by jscoverage/JSCover
 lib-cov
diff --git a/package.json b/package.json
index bcf86da..fe2936d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "react-bkash",
-	"version": "2.0.2",
+	"version": "2.0.3",
 	"description": "A React Component for Accepting Bkash Payments using React",
 	"author": "Shahriar Shojib <shahriar_shojib@hotmail.com>",
 	"license": "MIT",
diff --git a/src/bkash.d.ts b/src/bkash.types.ts
similarity index 77%
rename from src/bkash.d.ts
rename to src/bkash.types.ts
index de8d74b..733e977 100644
--- a/src/bkash.d.ts
+++ b/src/bkash.types.ts
@@ -1,6 +1,6 @@
 import { ICreatePaymentResponse, IPaymentRequest } from './utils';
 
-type BkashConfig = {
+export type BkashConfig = {
 	paymentMode: string;
 	paymentRequest: {
 		amount: string;
@@ -12,15 +12,10 @@ type BkashConfig = {
 	onClose: () => void;
 };
 
-interface BkashScript {
+export interface BkashScript {
 	init(config: BkashConfig): void;
 	create(): BkashScript;
 	execute(): BkashScript;
 	onSuccess(data: ICreatePaymentResponse): void;
 	onError(): void;
 }
-declare global {
-	interface Window {
-		bKash: BkashScript;
-	}
-}
diff --git a/src/index.tsx b/src/index.tsx
index f3d83ee..4951c17 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -9,7 +9,7 @@ import React, {
 	useRef,
 	useState,
 } from 'react';
-import { BkashConfig } from './bkash';
+import { BkashConfig, BkashScript } from './bkash.types';
 import { useAsync } from './hooks/useAsync';
 import {
 	BkashComponentConfig,
@@ -21,6 +21,8 @@ import {
 	post,
 } from './utils';
 
+declare const bKash: BkashScript;
+
 export type BkashButtonProps = {
 	onSuccess: BkashSuccessFunction;
 	onClose: () => void;
@@ -98,10 +100,10 @@ export const BkashButton: FC<BkashButtonProps> = ({
 					try {
 						const result = await config.onCreatePayment(request);
 						paymentID.current = result.paymentID;
-						window.bKash.create().onSuccess(result);
+						bKash.create().onSuccess(result);
 					} catch (error) {
 						setPaymentAPIError(error);
-						window.bKash.create().onError();
+						bKash.create().onError();
 					}
 					return;
 				}
@@ -112,12 +114,12 @@ export const BkashButton: FC<BkashButtonProps> = ({
 					config.additionalHeaders || {}
 				);
 				if (result.error !== null) {
-					window.bKash.create().onError();
+					bKash.create().onError();
 					setPaymentAPIError(result.error);
 					return;
 				}
 				paymentID.current = result.data.paymentID;
-				window.bKash.create().onSuccess(result.data);
+				bKash.create().onSuccess(result.data);
 			},
 
 			executeRequestOnAuthorization: async () => {
@@ -128,7 +130,7 @@ export const BkashButton: FC<BkashButtonProps> = ({
 							onSuccess(result);
 						} catch (error) {
 							setPaymentAPIError(error);
-							window.bKash.execute().onError();
+							bKash.execute().onError();
 						}
 						return;
 					}
@@ -141,7 +143,7 @@ export const BkashButton: FC<BkashButtonProps> = ({
 
 					if (result.error !== null) {
 						setPaymentAPIError(result.error);
-						window.bKash.execute().onError();
+						bKash.execute().onError();
 						return;
 					}
 					onSuccess(result.data);
@@ -151,14 +153,12 @@ export const BkashButton: FC<BkashButtonProps> = ({
 			onClose: () => onClose(),
 		};
 
-		if (!window.bKash) {
+		if (typeof bKash === 'undefined') {
 			setBkashNotFoundError(true);
 			return;
 		}
 
-		if (window.bKash) {
-			window.bKash.init(bkashConfig);
-		}
+		bKash.init(bkashConfig);
 	}, [config, onClose, onSuccess]);
 
 	// Load dependencies & setup bkash
diff --git a/tsconfig.json b/tsconfig.json
index 94c81f6..50d4a6e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,7 @@
 {
 	"compilerOptions": {
 		"outDir": "dist",
-		"module": "esnext",
+		"module": "CommonJS",
 		"target": "ES6",
 		"lib": ["es6", "dom", "es2016", "es2017"],
 		"sourceMap": true,