diff --git a/package.json b/package.json
index da4783c..45ed059 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "babel-jest": "24.7.1",
     "coveralls": "3.0.3",
     "jest": "24.7.1",
-    "np": "5.0.0",
+    "np": "4.0.2",
     "terser-webpack-plugin": "1.2.3",
     "ts-loader": "5.4.3",
     "tslint": "5.16.0",