diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..c9c217c
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,115 @@
+/**
+ * Call this with progress updates. It expects a number between 0 and 1.
+ * Multiple calls with the same number will result in only one onProgress() event.
+ * Progress percentage 1 is reported for you when the promise resolves. If you set it yourself, it will simply be ignored.
+ */
+declare type PProgressCallback = (percentage: number) => void;
+
+declare type PProgressExecutor<T> = (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void, progress: PProgressCallback) => void;
+
+declare interface PProgressAllOptions {
+    /**
+     * Number of concurrently pending promises
+     *
+     * To run the promises in series, set it to 1
+     * Default: Infinity, Minimum: 1
+     */
+    concurrency: number;
+}
+
+/**
+ * Create a promise that reports progress
+ */
+declare class PProgress<T> extends Promise<T> {
+
+    /**
+     * Convenience method to make your promise-returning or async function report progress
+     * @param input
+     */
+    public static fn(input: any): void;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>], options?: PProgressAllOptions): PProgress<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>], options?: PProgressAllOptions): PProgress<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>], options?: PProgressAllOptions): PProgress<[T1, T2, T3, T4, T5, T6, T7, T8]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>], options?: PProgressAllOptions): PProgress<[T1, T2, T3, T4, T5, T6, T7]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>], options?: PProgressAllOptions): PProgress<[T1, T2, T3, T4, T5, T6]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>], options?: PProgressAllOptions): PProgress<[T1, T2, T3, T4, T5]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>], options?: PProgressAllOptions): PProgress<[T1, T2, T3, T4]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>], options?: PProgressAllOptions): PProgress<[T1, T2, T3]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>], options?: PProgressAllOptions): PProgress<[T1, T2]>;
+
+    /**
+     * Convenience method to run multiple promises and get a total progress of all of them. It counts normal promises with progress 0 when pending and progress 1 when resolved. For PProgress type promises, it listens to their onProgress() method for more fine grained progress reporting. You can mix and match normal promises and PProgress promises
+     * @param values An array of Promises or PProgress instances.
+     * @returns A PProgress instance.
+     */
+    public static all<T>(values: (T | PromiseLike<T>)[], options?: PProgressAllOptions): PProgress<T[]>;
+
+    /**
+     * The current progress percentage of the promise as a number between 0 and 1
+     */
+    public readonly progress: number;
+
+    constructor(executor: PProgressExecutor<T>);
+
+    /**
+     * Accepts a function that gets instance.progress as an argument and is called for every progress event
+     * @param callback Function to call every time a progress is reported. Value passed will be number between 0 and 1
+     */
+    public onProgress(callback: (progress: number) => void): void;
+}
+
+export default PProgress;
diff --git a/package.json b/package.json
index a8638f8..735abf0 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
 	"version": "0.1.1",
 	"description": "Create a promise that reports progress",
 	"license": "MIT",
+	"typings": "index.d.ts",
 	"repository": "sindresorhus/p-progress",
 	"author": {
 		"name": "Sindre Sorhus",