diff --git a/js/packages/core/package.json b/js/packages/core/package.json
index a38a5f2d..6de6fcce 100644
--- a/js/packages/core/package.json
+++ b/js/packages/core/package.json
@@ -25,6 +25,7 @@
     "@seedpass/test-vectors": "workspace:*",
     "@types/ws": "^8.18.1",
     "jsdom": "^30.0.1",
+    "tsx": "^4.20.0",
     "typescript": "^5.7.0",
     "vitest": "^3.0.0",
     "ws": "^8.21.3"
diff --git a/js/pnpm-lock.yaml b/js/pnpm-lock.yaml
index 7bb1a1c1..588830a4 100644
--- a/js/pnpm-lock.yaml
+++ b/js/pnpm-lock.yaml
@@ -68,6 +68,9 @@ importers:
       jsdom:
         specifier: ^30.0.1
         version: 30.0.1(@noble/hashes@2.3.0)
+      tsx:
+        specifier: ^4.20.0
+        version: 4.23.12
       typescript:
         specifier: ^5.7.0
         version: 5.9.3