diff --git a/packages/bitcore-mnemonic/package.json b/packages/bitcore-mnemonic/package.json
index a7934f79e38..99d00db61d1 100644
--- a/packages/bitcore-mnemonic/package.json
+++ b/packages/bitcore-mnemonic/package.json
@@ -39,7 +39,7 @@
     "bitcore-build": "^8.25.10",
     "brfs": "^2.0.1",
     "chai": "^4.2.0",
-    "gulp": "^4.0.0",
+    "gulp": "^5.0.0",
     "mocha": "^5.2.0"
   },
   "dependencies": {