diff --git a/package-lock.json b/package-lock.json
index f6dba7c..d80648a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,30 +14,51 @@
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+      "resolved": "https://registry.npmjs.org/@asamuzakjp/dom-selector/-/dom-selector-6.5.6.tgz",
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+      "license": "MIT",
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@@ -122,17 +143,41 @@
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       "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=18"
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+      "peerDependencies": {
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+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
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+      "license": "MIT-0",
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       "license": "MIT",
       "dependencies": {
-        "tr46": "^5.0.0",
-        "webidl-conversions": "^7.0.0"
+        "tr46": "^6.0.0",
+        "webidl-conversions": "^8.0.0"
       },
       "engines": {
-        "node": ">=18"
+        "node": ">=20"
       }
     },
     "node_modules/why-is-node-running": {
@@ -2613,9 +2434,9 @@
       }
     },
     "node_modules/ws": {
-      "version": "8.18.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz",
-      "integrity": "sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==",
+      "version": "8.18.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
+      "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
       "dev": true,
       "license": "MIT",
       "engines": {
diff --git a/package.json b/package.json
index 08e1ec5..03ab70a 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "devDependencies": {
     "@total-typescript/exercise-cli": "^0.11.0",
     "@types/node": "^18.6.5",
-    "jsdom": "^25.0.0",
+    "jsdom": "^27.0.0",
     "typescript": "^5.6.2",
     "vite-tsconfig-paths": "^5.1.4",
     "vitest": "^3.0.5"