diff --git a/package.json b/package.json
index e4f8f1e5..2e1f0f58 100644
--- a/package.json
+++ b/package.json
@@ -20,11 +20,11 @@
   "license": "BSD-2-Clause",
   "devDependencies": {
     "@types/chai": "4.1.7",
-    "@types/mocha": "2.2.48",
+    "@types/mocha": "5.2.5",
     "chai": "4.2.0",
     "dirty-chai": "2.0.1",
     "flow-bin": "0.88.0",
-    "mocha": "4.1.0",
+    "mocha": "5.2.0",
     "ts-node": "4.1.0",
     "tslint": "5.11.0",
     "typescript": "2.9.2"