diff --git a/package.json b/package.json
index 4b99465..a6a0253 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,6 @@
   },
   "homepage": "https://github.com/softbrix/dibba_tree#readme",
   "devDependencies": {
-    "mocha": "3.2.0"
+    "mocha": "5.2.0"
   }
 }