diff --git a/package.json b/package.json
index 1a9f97d..c3d44ca 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "fastify": "^4.28.1",
     "gh-pages": "^6.2.0",
     "typedoc": "^0.28.13",
-    "typescript": "^5.6.3",
+    "typescript": "^5.9.3",
     "vitest": "^3.2.4"
   },
   "volta": {
diff --git a/yarn.lock b/yarn.lock
index 5956136..e01c1cb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1939,10 +1939,10 @@ typedoc@^0.28.13:
     minimatch "^9.0.5"
     yaml "^2.8.1"
 
-typescript@^5.6.3:
-  version "5.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.8.3.tgz#92f8a3e5e3cf497356f4178c34cd65a7f5e8440e"
-  integrity sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==
+typescript@^5.9.3:
+  version "5.9.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
+  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
 
 typical@^7.1.1, typical@^7.2.0:
   version "7.3.0"