diff --git a/packages/bitcore-mnemonic/package.json b/packages/bitcore-mnemonic/package.json
index a7934f79e38..f751a012931 100644
--- a/packages/bitcore-mnemonic/package.json
+++ b/packages/bitcore-mnemonic/package.json
@@ -38,7 +38,7 @@
     "assert": "^1.4.1",
     "bitcore-build": "^8.25.10",
     "brfs": "^2.0.1",
-    "chai": "^4.2.0",
+    "chai": "^4.3.7",
     "gulp": "^4.0.0",
     "mocha": "^5.2.0"
   },