diff --git a/package.json b/package.json
index 12935e3..75362db 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "prettier": "^1.13.3",
     "proptest": "0.0.4",
     "source-map-support": "^0.5.6",
-    "ts-node": "^6.0.5",
+    "ts-node": "^8.5.1",
     "tslint": "^5.10.0",
     "typescript": "^2.9.1"
   },