diff --git a/package.json b/package.json
index 91f1790..a366aee 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^2.0.1",
     "lodash.frompairs": "^4.0.1",
-    "mocha": "^4.0.0",
+    "mocha": "^5.0.0",
     "sinon": "^4.0.0",
     "typechecker": "^4.4.0",
     "webpack": "^3.0.0"