diff --git a/package.json b/package.json
index be282d4..4666434 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
     "preact": "^10.29.0",
     "tap-spec": "^5.0.0",
     "typedoc": "^0.28.1",
-    "typescript": "^5.9.3",
+    "typescript": "^6.0.2",
     "vite": "^7.3.1"
   },
   "author": "nichoth <nichoth@nichoth.com> (https://nichoth.com)",