diff --git a/package.json b/package.json
index 4822f18..fc9a602 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "prepack": "yarn build"
   },
   "devDependencies": {
-    "@types/chai": "^4.2.16",
+    "@types/chai": "4.2.21",
     "@types/md5": "^2.3.0",
     "@types/mocha": "^8.2.2",
     "@types/node": "^16.7.12",
diff --git a/yarn.lock b/yarn.lock
index 34822e6..8631731 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -939,10 +939,10 @@
     "@parcel/utils" "^1.11.0"
     physical-cpu-count "^2.0.0"
 
-"@types/chai@^4.2.16":
-  version "4.2.18"
-  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.18.tgz#0c8e298dbff8205e2266606c1ea5fbdba29b46e4"
-  integrity sha512-rS27+EkB/RE1Iz3u0XtVL5q36MGDWbgYe7zWiodyKNUnthxY0rukK5V36eiUCtCisB7NN8zKYH6DO2M37qxFEQ==
+"@types/chai@4.2.21":
+  version "4.2.21"
+  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.21.tgz#9f35a5643129df132cf3b5c1ec64046ea1af0650"
+  integrity sha512-yd+9qKmJxm496BOV9CMNaey8TWsikaZOwMRwPHQIjcOJM9oV+fi9ZMNw3JsVnbEEbo2gRTDnGEBv8pjyn67hNg==
 
 "@types/md5@^2.3.0":
   version "2.3.0"