diff --git a/package.json b/package.json
index 49b3cfd..b5f1349 100644
--- a/package.json
+++ b/package.json
@@ -67,9 +67,9 @@
     "@types/node": "^22.9.3",
     "jest": "^30.0.0",
     "prettier": "^2.7.1",
-    "ts-jest": "^29.4.0",
+    "ts-jest": "^29.4.7",
     "tsx": "^4.22.4",
-    "typescript": "^5.9.0"
+    "typescript": "^6.0.3"
   },
   "overrides": {
     "js-yaml": "^3.15.0"
diff --git a/tsconfig.json b/tsconfig.json
index a4f3187..168172b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,6 +7,14 @@
     "resolveJsonModule": true,
     "esModuleInterop": true,
     "isolatedModules": true,
+    // TS 6 no longer infers rootDir (aka.ms/ts6, error TS5011). The JSON
+    // import of ../package.json makes the effective root the project
+    // directory, which preserves the lib/src/** emit layout.
+    "rootDir": "./",
+    // TS 6 flips the effective noImplicitAny default to true. Pinned to keep
+    // the upgrade diff behavior-preserving; see format-lint-report.ts for the
+    // known implicit-any sites awaiting cleanup.
+    "noImplicitAny": false,
     "types": [
       "jest",
       "node"