diff --git a/package.json b/package.json
index 00727bf9..c137a2b8 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "radashi-helper": "^0.1.4",
     "tsup": "^8.1.0",
     "typescript": "^5.5.2",
-    "vitest": "2.0.5"
+    "vitest": "2.1.1"
   },
   "sideEffects": false,
   "browserslist": [
diff --git a/vitest.config.ts b/vitest.config.ts
index 677c287a..4e9039ec 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -15,6 +15,11 @@ export default defineConfig(env => ({
       include: ['src/**'],
     },
     setupFiles: env.mode === 'benchmark' ? ['benchmarks/globals.ts'] : [],
+    typecheck: {
+      include: ['tests/**/*.test-d.ts'],
+      enabled: true,
+      tsconfig: "tests/tsconfig.json"
+    },
   },
   resolve: {
     alias: {