diff --git a/package.json b/package.json
index ef87b2e5..fda89150 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "html-tag-validator": "^1.5.0",
     "istanbul": "^0.4.3",
     "mocha": "^5.1.0",
-    "rewire": "^2.5.1"
+    "rewire": "^4.0.1"
   },
   "dependencies": {
     "bluebird": "^3.5.2",