diff --git a/package-lock.json b/package-lock.json
index 6fec16c..1d67679 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -123,9 +123,9 @@
       }
     },
     "@types/chai": {
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-      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.1.7.tgz",
-      "integrity": "sha512-2Y8uPt0/jwjhQ6EiluT0XCri1Dbplr0ZxfFXUz+ye13gaqE8u5gL5ppao1JrUYr9cIip5S6MvQzBS7Kke7U9VA==",
+      "version": "4.2.20",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.20.tgz",
+      "integrity": "sha512-E121rHk/4BlcEwANZOwcHl8L/Sl0zyIFXJoyggXkl7FCT/4MTf5u25f+qiphe0V5ELaFIkCptgvbf4whCJUVMA==",
       "dev": true
     },
     "@types/mocha": {