diff --git a/types/crypto-js/index.d.ts b/types/crypto-js/index.d.ts
index 22e5c1253c..99df7ce4cb 100644
--- a/types/crypto-js/index.d.ts
+++ b/types/crypto-js/index.d.ts
@@ -141,6 +141,7 @@ declare namespace CryptoJS {
 		lib: {
 			WordArray: {
 				create: (v: any) => LibWordArray;
+				random: (v: number) => string;
 			};
 		};
 		mode: {