diff --git a/packages/core/package.json b/packages/core/package.json
index 8839d9e..5bfa3a1 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -48,6 +48,7 @@
     "ultrahtml": "^1.5.3"
   },
   "devDependencies": {
+    "@types/esprima": "^4.0.6",
     "@vitest/coverage-istanbul": "3.0.9",
     "@vitest/coverage-v8": "3.0.9",
     "@vitest/ui": "3.0.9",