fixed #503

Author: rg911

package-lock.json

@@ -75,7 +75,7 @@
     "ripemd160": "^2.0.2",
     "rxjs": "^6.5.3",
     "rxjs-compat": "^6.5.3",
-    "symbol-openapi-typescript-node-client": "0.8.7",
+    "symbol-openapi-typescript-node-client": "0.8.9",
     "tweetnacl": "^1.0.3",
     "utf8": "^3.0.0",
     "ws": "^7.2.3"