diff --git a/package.json b/package.json
index 91af7ea..bb04b40 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "eslint-config-pretty-standard": "^2.0.0",
     "eslint-plugin-prettier": "^3.0.0",
     "istanbul": "^0.4.5",
-    "mocha": "^3.3.0",
+    "mocha": "^5.2.0",
     "prettier": "^1.14.3",
     "sinon": "^2.1.0",
     "unexpected": "^10.27.0",