diff --git a/package.json b/package.json
index 1b19e6b..a5baac1 100644
--- a/package.json
+++ b/package.json
@@ -70,5 +70,8 @@
     "jest": "^24.8.0",
     "ts-jest": "^24.0.2",
     "typescript": "^3.5.3"
+  },
+  "engines": {
+    "node": ">= 6.0.0"
   }
 }