diff --git a/index.d.ts b/index.d.ts
index 23e46ca..ff5d61a 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,4 +1,5 @@
 declare module 'fast-json-stable-stringify' {
   function stringify(obj: any): string;
+  namespace stringify {}
   export = stringify;
 }