diff --git a/package.json b/package.json
index 1c23355..891310d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "simple-hmac-auth",
-  "version": "3.3.5",
+  "version": "4.0.0",
   "description": "Library designed to make building APIs that use HMAC signatures simple.",
   "keywords": [
     "authentication",