diff --git a/package.json b/package.json
index f934241..72f60a6 100644
--- a/package.json
+++ b/package.json
@@ -90,7 +90,7 @@
     "sinon": "^1.17.6",
     "sinon-chai": "^2.8.0",
     "stream-equal": "^1.0.0",
-    "supertest": "^2.0.1",
+    "supertest": "^4.0.0",
     "ts-node": "^3.0.6",
     "tslint": "5.5.0",
     "typescript": "2.4.1"