diff --git a/package.json b/package.json
index 79b78fe..597d488 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
         "@types/mocha": "5.2.5",
         "@types/chai": "4.1.7",
         "typescript": "3.2.1",
-        "gulp": "3.9.1",
+        "gulp": "5.0.1",
         "gulp-less": "4.0.1",
         "chai": "4.2.0",
         "mocha": "5.2.0"