diff --git a/package-lock.json b/package-lock.json
index 4dc1678..6deb809 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25,7 +25,7 @@
         "prettier": "^3.5.3",
         "style-loader": "^4.0.0",
         "ts-loader": "^9.5.2",
-        "typescript": "^5.8.3",
+        "typescript": "^5.9.2",
         "userscript-metadata-webpack-plugin": "^0.4.2",
         "webpack": "^5.99.7",
         "webpack-bundle-analyzer": "^4.10.2",
@@ -3125,9 +3125,9 @@
       "license": "0BSD"
     },
     "node_modules/typescript": {
-      "version": "5.8.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
-      "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
+      "version": "5.9.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
+      "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index 157ccec..f8dfd6e 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "prettier": "^3.5.3",
     "style-loader": "^4.0.0",
     "ts-loader": "^9.5.2",
-    "typescript": "^5.8.3",
+    "typescript": "^5.9.2",
     "userscript-metadata-webpack-plugin": "^0.4.2",
     "webpack": "^5.99.7",
     "webpack-bundle-analyzer": "^4.10.2",