diff --git a/package.json b/package.json
index 17c5c1e..6c29d22 100644
--- a/package.json
+++ b/package.json
@@ -108,7 +108,7 @@
     "mkdirp": "^1.0.4",
     "parcel-bundler": "^1.12.4",
     "sourcegraph": "^25.7.0",
-    "typescript": "^3.8.3"
+    "typescript": "^5.9.3"
   },
   "dependencies": {}
 }
diff --git a/yarn.lock b/yarn.lock
index 8192783..9c3a113 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7151,10 +7151,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.8.3:
-  version "3.9.10"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.10.tgz#70f3910ac7a51ed6bef79da7800690b19bf778b8"
-  integrity sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==
+typescript@^5.9.3:
+  version "5.9.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
+  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
 
 unbox-primitive@^1.0.2:
   version "1.0.2"