diff --git a/package.json b/package.json
index 37daaf2..f9b58bf 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "axios": "0.19.0"
   },
   "devDependencies": {
-    "@types/chai": "4.1.7",
+    "@types/chai": "4.2.1",
     "@types/mocha": "5.2.7",
     "@types/nock": "10.0.3",
     "@types/rewire": "2.5.28",