diff --git a/package-lock.json b/package-lock.json
index 59c7f34..74e0d8f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -364,9 +364,9 @@
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     },
     "@types/chai": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.0.tgz",
-      "integrity": "sha512-zw8UvoBEImn392tLjxoavuonblX/4Yb9ha4KBU10FirCfwgzhKO0dvyJSF9ByxV1xK1r2AgnAi/tvQaLgxQqxA==",
+      "version": "4.2.18",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.18.tgz",
+      "integrity": "sha512-rS27+EkB/RE1Iz3u0XtVL5q36MGDWbgYe7zWiodyKNUnthxY0rukK5V36eiUCtCisB7NN8zKYH6DO2M37qxFEQ==",
       "dev": true
     },
     "@types/mocha": {
diff --git a/package.json b/package.json
index 57a6f12..e44a89a 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "typescript": ">=3.6.2",
     "tslint": ">=6.1.3",
     "ts-node": ">=8.3.0",
-    "@types/chai": "4.2.0",
+    "@types/chai": "4.2.18",
     "@types/mocha": "^5.2.7",
     "chai": "4.2.0",
     "mocha": "6.2.0"