diff --git a/package-lock.json b/package-lock.json
index 64d17873ff..f0f95165aa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "botframework-webchat-root",
-  "version": "4.2.0",
+  "version": "4.2.1-0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 58a2ac6a50..55e075ea45 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "botframework-webchat-root",
-  "version": "4.2.0",
+  "version": "4.2.1-0",
   "private": true,
   "files": [
     "lib/**/*"