diff --git a/package.json b/package.json
index 35ed3b1..2094938 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
   },
   "devDependencies": {
     "benchmark": "2.1.2",
-    "eslint": "4.11.0",
-    "mocha": "3.0.2"
+    "eslint": "4.19.1",
+    "mocha": "6.1.3"
   }
 }