diff --git a/package-lock.json b/package-lock.json
index 04594d7..1b64648 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "firmata",
-  "version": "0.20.0",
+  "version": "0.21.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index e494cad..b508768 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "firmata",
   "description": "Firmata protocol implementation for programmatic interaction with Arduino and Arduino compatible development boards.",
-  "version": "0.20.0",
+  "version": "0.21.0",
   "author": "Julian Gautier",
   "license": "MIT",
   "homepage": "http://www.github.com/firmata/firmata.js",