diff --git a/package-lock.json b/package-lock.json
index b5b5667..0ebd494 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "@types/chai": {
-      "version": "4.1.4",
-      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.1.4.tgz",
-      "integrity": "sha512-h6+VEw2Vr3ORiFCyyJmcho2zALnUq9cvdB/IO8Xs9itrJVCenC7o26A6+m7D0ihTTr65eS259H5/Ghl/VjYs6g==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.0.tgz",
+      "integrity": "sha512-zw8UvoBEImn392tLjxoavuonblX/4Yb9ha4KBU10FirCfwgzhKO0dvyJSF9ByxV1xK1r2AgnAi/tvQaLgxQqxA==",
       "dev": true
     },
     "@types/lodash": {
diff --git a/package.json b/package.json
index 6d90cdc..469996f 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "typescript": "^3.3.3333"
   },
   "devDependencies": {
-    "@types/chai": "4.1.4",
+    "@types/chai": "4.2.0",
     "@types/lodash": "4.14.130",
     "@types/mocha": "5.2.6",
     "chai": "4.1.2",