diff --git a/unify-release-build-task/package-lock.json b/unify-release-build-task/package-lock.json
index 5397825..a70786b 100644
--- a/unify-release-build-task/package-lock.json
+++ b/unify-release-build-task/package-lock.json
@@ -380,9 +380,9 @@
       "dev": true
     },
     "@types/chai": {
-      "version": "4.2.5",
-      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.5.tgz",
-      "integrity": "sha512-YvbLiIc0DbbhiANrfVObdkLEHJksQZVq0Uvfg550SRAKVYaEJy+V70j65BVe2WNp6E3HtKsUczeijHFCjba3og==",
+      "version": "4.2.8",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.8.tgz",
+      "integrity": "sha512-U1bQiWbln41Yo6EeHMr+34aUhvrMVyrhn9lYfPSpLTCrZlGxU4Rtn1bocX+0p2Fc/Jkd2FanCEXdw0WNfHHM0w==",
       "dev": true
     },
     "@types/color-name": {
diff --git a/unify-release-build-task/package.json b/unify-release-build-task/package.json
index 48fed7f..d735099 100644
--- a/unify-release-build-task/package.json
+++ b/unify-release-build-task/package.json
@@ -49,7 +49,7 @@
     "@stryker-mutator/mocha-framework": "^2.4.0",
     "@stryker-mutator/mocha-runner": "^2.4.0",
     "@stryker-mutator/typescript": "^2.4.0",
-    "@types/chai": "^4.2.5",
+    "@types/chai": "^4.2.8",
     "@types/mocha": "^5.2.7",
     "@types/node": "^13.1.8",
     "@types/q": "^1.5.2",
diff --git a/unify-release-build-task/yarn.lock b/unify-release-build-task/yarn.lock
index 8d75dc0..7345707 100644
--- a/unify-release-build-task/yarn.lock
+++ b/unify-release-build-task/yarn.lock
@@ -208,10 +208,10 @@
   resolved "https://registry.yarnpkg.com/@types/caseless/-/caseless-0.12.2.tgz#f65d3d6389e01eeb458bd54dc8f52b95a9463bc8"
   integrity sha512-6ckxMjBBD8URvjB6J3NcnuAn5Pkl7t3TizAg+xdlzzQGSPSmBcXf8KoIH0ua/i+tio+ZRUHEXp0HEmvaR4kt0w==
 
-"@types/chai@*", "@types/chai@^4.2.5":
-  version "4.2.5"
-  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.5.tgz#f8da153ebbe30babb0adc9a528b9ad32be3175a2"
-  integrity sha512-YvbLiIc0DbbhiANrfVObdkLEHJksQZVq0Uvfg550SRAKVYaEJy+V70j65BVe2WNp6E3HtKsUczeijHFCjba3og==
+"@types/chai@*", "@types/chai@^4.2.8":
+  version "4.2.8"
+  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.8.tgz#c8d645506db0d15f4aafd4dfa873f443ad87ea59"
+  integrity sha512-U1bQiWbln41Yo6EeHMr+34aUhvrMVyrhn9lYfPSpLTCrZlGxU4Rtn1bocX+0p2Fc/Jkd2FanCEXdw0WNfHHM0w==
 
 "@types/color-name@^1.1.1":
   version "1.1.1"