diff --git a/Changelog b/Changelog
index 412d6e5..6eb836b 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,7 @@
+0.3.21
+======
+  * Update `faye-websocket` and `websocket-driver` to address DDoS vulnerability #275
+
 0.3.20
 ======
   * Updated `node-uuid` and `coffeescript`
diff --git a/package-lock.json b/package-lock.json
index 75d20db..992e164 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "sockjs",
-  "version": "0.3.20",
+  "version": "0.3.21",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index bd7c7c7..f3315fc 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "sockjs",
   "description": "SockJS-node is a server counterpart of SockJS-client a JavaScript library that provides a WebSocket-like object in the browser. SockJS gives you a coherent, cross-browser, Javascript API which creates a low latency, full duplex, cross-domain communication channel between the browser and the web server.",
-  "version": "0.3.20",
+  "version": "0.3.21",
   "author": "Marek Majkowski",
   "bugs": {
     "url": "https://github.com/sockjs/sockjs-node/issues"