diff --git a/tools/cldr-apps/js/package-lock.json b/tools/cldr-apps/js/package-lock.json
index f8e7dccfe69..fb9b159e3d8 100644
--- a/tools/cldr-apps/js/package-lock.json
+++ b/tools/cldr-apps/js/package-lock.json
@@ -22,7 +22,7 @@
         "xlsx": "https://cdn.sheetjs.com/xlsx-0.20.2/xlsx-0.20.2.tgz"
       },
       "devDependencies": {
-        "chai": "^5.1.1",
+        "chai": "^5.2.1",
         "css-loader": "^6.8.1",
         "esm": "^3.2.25",
         "mocha": "^10.8.2",
@@ -1487,10 +1487,11 @@
       "license": "CC-BY-4.0"
     },
     "node_modules/chai": {
-      "version": "5.1.1",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-5.1.1.tgz",
-      "integrity": "sha512-pT1ZgP8rPNqUgieVaEY+ryQr6Q4HXNg8Ei9UnLUrjN4IA7dvQC5JB+/kxVcPNDHyBcc/26CXPkbNzq3qwrOEKA==",
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-5.2.1.tgz",
+      "integrity": "sha512-5nFxhUrX0PqtyogoYOA8IPswy5sZFTOsBFl/9bNsmDLgsxYTzSZQJDPppDnZPTQbzSEm0hqGjWPzRemQCYbD6A==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "assertion-error": "^2.0.1",
         "check-error": "^2.1.1",
@@ -1499,7 +1500,7 @@
         "pathval": "^2.0.0"
       },
       "engines": {
-        "node": ">=12"
+        "node": ">=18"
       }
     },
     "node_modules/chalk": {
diff --git a/tools/cldr-apps/js/package.json b/tools/cldr-apps/js/package.json
index 2654afe424c..915d4076af0 100644
--- a/tools/cldr-apps/js/package.json
+++ b/tools/cldr-apps/js/package.json
@@ -30,7 +30,7 @@
   },
   "homepage": "https://github.com/unicode-org/cldr#readme",
   "devDependencies": {
-    "chai": "^5.1.1",
+    "chai": "^5.2.1",
     "css-loader": "^6.8.1",
     "esm": "^3.2.25",
     "mocha": "^10.8.2",