diff --git a/package.json b/package.json
index fb8fb5f9772236071f33f9e053506675aa1718b0..311834c4f8fa1e561280db2effa43fa927ea3534 100644
--- a/package.json
+++ b/package.json
@@ -167,7 +167,7 @@
     "@babel/preset-env": "7.5.5",
     "@babel/preset-typescript": "7.3.3",
     "@types/bunyan": "1.8.6",
-    "@types/chai": "4.2.0",
+    "@types/chai": "4.2.1",
     "@types/convert-hrtime": "2.0.0",
     "@types/fs-extra": "8.0.0",
     "@types/got": "9.6.7",
diff --git a/yarn.lock b/yarn.lock
index b7ac1c9568034cd72ce3a18fd7fd9871a9f5258b..7fcd564fd3582a7a903284073d00aafe9db358a0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1102,10 +1102,10 @@
   dependencies:
     "@types/node" "*"
 
-"@types/chai@4.2.0":
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.0.tgz#2478260021408dec32c123a7cad3414beb811a07"
-  integrity sha512-zw8UvoBEImn392tLjxoavuonblX/4Yb9ha4KBU10FirCfwgzhKO0dvyJSF9ByxV1xK1r2AgnAi/tvQaLgxQqxA==
+"@types/chai@4.2.1":
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.1.tgz#de162553aceca778d989929d821c5d4942921ebc"
+  integrity sha512-LDKlQW/V8bQr5p9aoHye9p7x9faxq0GVeWAkn/Zgyyn848LIAzuR1sHQjGmUBFUpINuGWDG2NTM/ofA2aLMIew==
 
 "@types/convert-hrtime@2.0.0":
   version "2.0.0"