Prep for 3.21.4 release. (#223)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a8d69b..0a851aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,12 @@
 
 # Changelog
 
+## v3.21.4
+
+Adding missing main property to Exec type (#222)
+chore: Fix spelling errors (#219)
+Add concurrency to the limits map to allow the client to request conrrency limits (#218)
+
 ## v3.21.3
 
 * Relax action kind typing (#215)
diff --git a/package-lock.json b/package-lock.json
index 2502c6f..8bb56ed 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "openwhisk",
-  "version": "3.21.3",
+  "version": "3.21.4",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 100fb1d..be9c689 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openwhisk",
-  "version": "3.21.3",
+  "version": "3.21.4",
   "description": "JavaScript client library for the Apache OpenWhisk platform",
   "main": "lib/main.js",
   "typings": "lib/main.d.ts",