diff --git a/index.d.ts b/index.d.ts
index 7475b24..07a1bf4 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -6,7 +6,7 @@ declare module "express-urlrewrite" {
 	module urlRewrite {
 
 		interface urlrewrite {
-			(from: string, to?: string): expressUrlRewriteInstance
+			(from: string | RegExp, to?: string): expressUrlRewriteInstance
 		}
 
 		interface expressUrlRewriteInstance {