diff --git a/package.json b/package.json
index 8d87e2d..4d8236e 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
         "test": "gulp test"
     },
     "devDependencies": {
-        "@types/chai": "4.1.7",
+        "@types/chai": "4.2.0",
         "@types/mocha": "5.2.7",
         "@types/node": "12.6.7",
         "chai": "4.1.2",