diff --git a/package.json b/package.json
index 680f2df..073839d 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "mocha": "^4.0.0",
-    "proxyquire": "^1.7.11",
+    "proxyquire": "^2.1.0",
     "sinon": "^4.0.0",
     "standard": "^10.0.1",
     "semantic-release": "^7.0.1"