diff --git a/package-lock.json b/package-lock.json
index 6b9b9af..11c2bbb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -44,7 +44,7 @@
         "textlint-rule-preset-ja-spacing": "^2.3.0",
         "textlint-rule-preset-japanese": "^7.0.0",
         "ts-jest": "^29.1.0",
-        "typescript": "4.9.5"
+        "typescript": "5.9.3"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
@@ -15446,16 +15446,16 @@
       "dev": true
     },
     "node_modules/typescript": {
-      "version": "4.9.5",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
-      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
       },
       "engines": {
-        "node": ">=4.2.0"
+        "node": ">=14.17"
       }
     },
     "node_modules/unbox-primitive": {
diff --git a/package.json b/package.json
index 737796a..fbc7131 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "textlint-rule-preset-ja-spacing": "^2.3.0",
     "textlint-rule-preset-japanese": "^7.0.0",
     "ts-jest": "^29.1.0",
-    "typescript": "4.9.5"
+    "typescript": "5.9.3"
   },
   "volta": {
     "node": "18.16.0"