diff --git a/axios.d.ts b/axios.d.ts
index d7b6cb8..036f8c6 100644
--- a/axios.d.ts
+++ b/axios.d.ts
@@ -83,8 +83,8 @@ export interface AxiosStatic extends AxiosInstance {
   (config: AxiosRequestConfig): AxiosPromise;
   (url: string, config?: AxiosRequestConfig): AxiosPromise;
   create(config?: AxiosRequestConfig): AxiosInstance;
-  all(iterable: any): any;
-  spread(callback: any): any;
+  all<T>(values: (T | Promise<T>)[]): Promise<T[]>;
+  spread<T, R>(callback: (...args: T[]) => R): (array: T[]) => R;
 }
 
 declare const Axios: AxiosStatic;
diff --git a/test/typescript/axios.ts b/test/typescript/axios.ts
index d797451..936c3ca 100644
--- a/test/typescript/axios.ts
+++ b/test/typescript/axios.ts
@@ -203,3 +203,17 @@ const adapter: AxiosAdapter = (config: AxiosRequestConfig) => {
 };
 
 axios.defaults.adapter = adapter;
+
+// axios.all
+
+const promises = [
+  Promise.resolve(1),
+  Promise.resolve(2)
+];
+
+const promise: Promise<number[]> = axios.all(promises);
+
+// axios.spread
+
+const fn1 = (a: number, b: number, c: number) => `${a}-${b}-${c}`;
+const fn2: (arr: number[]) => string = axios.spread(fn1);