diff --git a/types/crypto-js/crypto-js-tests.ts b/types/crypto-js/crypto-js-tests.ts
index 59f1d684ed..0aad6a2ac3 100644
--- a/types/crypto-js/crypto-js-tests.ts
+++ b/types/crypto-js/crypto-js-tests.ts
@@ -18,6 +18,8 @@ FR.onloadend = () => {
 	var hash = CryptoJS.SHA1(CryptoJS.lib.WordArray.create(FR.result)).toString()
 }
 
+var randomWordArrayEncoded = CryptoJS.lib.WordArray.random(16).toString(CryptoJS.enc.Hex);
+
 // Ciphers
 var encrypted: CryptoJS.WordArray;
 var decrypted: CryptoJS.DecryptedMessage;
diff --git a/types/crypto-js/index.d.ts b/types/crypto-js/index.d.ts
index faeeac78e6..c6bed8576e 100644
--- a/types/crypto-js/index.d.ts
+++ b/types/crypto-js/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for crypto-js v3.1.8
 // Project: https://github.com/evanvosberg/crypto-js
 // Definitions by: Michael Zabka <https://github.com/misak113>
+//                 Max Lysenko <https://github.com/maximlysenko>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 export = CryptoJS;
@@ -43,6 +44,7 @@ declare namespace CryptoJS {
 	interface LibWordArray {
 		sigBytes: number,
 		words: number[],
+		toString(encoder?: Encoder): string;
 	}
 	export interface WordArray {
 		iv: string;
@@ -145,7 +147,7 @@ declare namespace CryptoJS {
 		lib: {
 			WordArray: {
 				create: (v: any) => LibWordArray;
-				random: (v: number) => string;
+				random: (v: number) => LibWordArray;
 			};
 		};
 		mode: {