diff --git a/core/package.json b/core/package.json
index 120ac1520..3995d7081 100644
--- a/core/package.json
+++ b/core/package.json
@@ -5,7 +5,7 @@
     "@types/es6-shim": "0.31.34",
     "@types/node": "^9.6.7",
     "dts-generator": "^2.0.0",
-    "grunt": "0.4.5",
+    "grunt": "1.5.3",
     "grunt-ts": "5.5.1",
     "intern": "3.3.2",
     "typescript": "2.2.2"