bump version number
diff --git a/lib/js/package-lock.json b/lib/js/package-lock.json
index f95e31f..2697f4a 100644
--- a/lib/js/package-lock.json
+++ b/lib/js/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "thrift",
-  "version": "0.18.0",
+  "version": "0.19.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {