diff --git a/types/react-native-background-downloader/index.d.ts b/types/react-native-background-downloader/index.d.ts
index 92fbac241c..c5eed40d67 100644
--- a/types/react-native-background-downloader/index.d.ts
+++ b/types/react-native-background-downloader/index.d.ts
@@ -1,9 +1,14 @@
 // Type definitions for react-native-background-downloader 2.3
 // Project: https://github.com/EkoLabs/react-native-background-downloader.git
 // Definitions by: Junseong Park <https://github.com/Kweiza>
+//                 Adam Hunter <https://github.com/adamrhunter>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-type SetHeaders = (h: object) => any;
+export interface DownloadHeaders {
+  [key: string]: string | null;
+}
+
+type SetHeaders = (h: DownloadHeaders) => void;
 
 export interface TaskInfoObject {
     id: string;
@@ -17,10 +22,17 @@ export type BeginHandler = (expectedBytes: number) => any;
 export type ProgressHandler = (percent: number, bytesWritten: number, totalBytes: number) => any;
 export type DoneHandler = () => any;
 export type ErrorHandler = (error: any, errorCode: any) => any;
+export enum DownloadTaskState {
+  DOWNLOADING = 'DOWNLOADING',
+  PAUSED = 'PAUSED',
+  DONE = 'DONE',
+}
+
 export interface DownloadTask {
     constructor: (taskInfo: TaskInfo) => DownloadTask;
 
-    state: string;
+    id: string;
+    state: DownloadTaskState;
     percent: number;
     bytesWritten: number;
     totalBytes: number;
@@ -46,7 +58,7 @@ export interface DownloadOption {
     id: string;
     url: string;
     destination: string;
-    headers?: object;
+    headers?: DownloadHeaders;
 }
 
 export type Download = (options: DownloadOption) => DownloadTask;
diff --git a/types/react-native-background-downloader/react-native-background-downloader-tests.tsx b/types/react-native-background-downloader/react-native-background-downloader-tests.tsx
index 5ee266e781..d7c2ec5b99 100644
--- a/types/react-native-background-downloader/react-native-background-downloader-tests.tsx
+++ b/types/react-native-background-downloader/react-native-background-downloader-tests.tsx
@@ -1,9 +1,18 @@
-import RNBackgroundDownloader, { DownloadTask } from 'react-native-background-downloader';
+import RNBackgroundDownloader, { DownloadTask, DownloadTaskState } from 'react-native-background-downloader';
+
+// Set global headers for downloader
+RNBackgroundDownloader.setHeaders({
+  'x-custom': 'Custom Header',
+  'x-custom-2': 'Another Custom Header',
+});
 
 const task = RNBackgroundDownloader.download({
     id: 'file123',
     url: 'https://link-to-very.large/file.zip',
     destination: `${RNBackgroundDownloader.directories.documents}/file.zip`,
+    headers: {
+      'x-custom-3': 'a-third-header',
+    },
 })
     .begin(expectedBytes => {
         console.log(`Going to download ${expectedBytes} bytes!`);
@@ -19,6 +28,22 @@ const task = RNBackgroundDownloader.download({
     });
 
 const taskFuncTest = (task: DownloadTask) => {
+    // Check task state
+    switch (task.state) {
+      case DownloadTaskState.DONE: {
+        console.log('Task is in state DONE');
+        break;
+      }
+      case DownloadTaskState.DOWNLOADING: {
+        console.log('Task is in state DOWNLOADING');
+        break;
+      }
+      case DownloadTaskState.PAUSED: {
+        console.log('Task is in state PAUSED');
+        break;
+      }
+    }
+
     // Pause the task
     task.pause();