diff --git a/src/nerdbank-gitversioning.npm/package.json b/src/nerdbank-gitversioning.npm/package.json
index fd549afe..129235ed 100644
--- a/src/nerdbank-gitversioning.npm/package.json
+++ b/src/nerdbank-gitversioning.npm/package.json
@@ -34,7 +34,7 @@
     "merge2": "1.4.1",
     "path": "0.12.7",
     "source-map": "0.7.6",
-    "typescript": "5.5.4"
+    "typescript": "5.9.2"
   },
   "dependencies": {},
   "scripts": {
diff --git a/src/nerdbank-gitversioning.npm/yarn.lock b/src/nerdbank-gitversioning.npm/yarn.lock
index c4d7e305..46e67f47 100644
--- a/src/nerdbank-gitversioning.npm/yarn.lock
+++ b/src/nerdbank-gitversioning.npm/yarn.lock
@@ -2058,10 +2058,10 @@ type@^2.7.2:
   resolved "https://registry.yarnpkg.com/type/-/type-2.7.3.tgz#436981652129285cc3ba94f392886c2637ea0486"
   integrity sha512-8j+1QmAbPvLZow5Qpi6NCaN8FB60p/6x8/vfNqOk/hC+HuvFZhL4+WfekuhQLiqFZXOgQdrs3B+XxEmCc6b3FQ==
 
-typescript@5.5.4:
-  version "5.5.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.5.4.tgz#d9852d6c82bad2d2eda4fd74a5762a8f5909e9ba"
-  integrity sha512-Mtq29sKDAEYP7aljRgtPOpTvOfbwRWlS6dPRzwjdE+C0R4brX/GUyhHSecbHMFLNBLcJIPt9nl9yG5TZ1weH+Q==
+typescript@5.9.2:
+  version "5.9.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.9.2.tgz#d93450cddec5154a2d5cabe3b8102b83316fb2a6"
+  integrity sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==
 
 unc-path-regex@^0.1.2:
   version "0.1.2"