diff --git a/package.json b/package.json
index 74c0644..a26b10f 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "@istanbuljs/nyc-config-typescript": "0.1.3",
     "@microsoft/api-documenter": "7.7.1",
     "@microsoft/api-extractor": "7.7.0",
-    "@types/chai": "4.2.5",
+    "@types/chai": "4.2.6",
     "@types/chai-as-promised": "7.1.2",
     "@types/mocha": "5.2.7",
     "@types/sinon-chai": "3.2.3",
diff --git a/yarn.lock b/yarn.lock
index 1e660e8..a6fce70 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -229,10 +229,10 @@
   resolved "https://artifacts.apextoaster.com/repository/group-npm/@types/chai/-/chai-4.2.3.tgz#419477a3d5202bad19e14c787940a61dc9ea6407"
   integrity sha512-VRw2xEGbll3ZiTQ4J02/hUjNqZoue1bMhoo2dgM2LXjDdyaq4q80HgBDHwpI0/VKlo4Eg+BavyQMv/NYgTetzA==
 
-"@types/chai@4.2.5":
-  version "4.2.5"
-  resolved "https://artifacts.apextoaster.com/repository/group-npm/@types/chai/-/chai-4.2.5.tgz#f8da153ebbe30babb0adc9a528b9ad32be3175a2"
-  integrity sha512-YvbLiIc0DbbhiANrfVObdkLEHJksQZVq0Uvfg550SRAKVYaEJy+V70j65BVe2WNp6E3HtKsUczeijHFCjba3og==
+"@types/chai@4.2.6":
+  version "4.2.6"
+  resolved "https://artifacts.apextoaster.com/repository/group-npm/@types/chai/-/chai-4.2.6.tgz#a55625d151d9c7c7a0a95920632131d66480bce9"
+  integrity sha512-HF8faEUA4JurIm+68VaA2KedtZf5LYdXpQEAbIAN79DwWQbO82BNTksZgCH3UMqbZHXex9C6TrBfg7OUInRISQ==
 
 "@types/eslint-visitor-keys@^1.0.0":
   version "1.0.0"