Package 3.21.6 (#232)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa10357..2b4dfe9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,10 @@
 
 # Changelog
 
+## v3.21.6
+
+fix: Do not modify input params. (#231)
+
 ## v3.21.5
 
 Support client retries (#227)
diff --git a/package-lock.json b/package-lock.json
index f1c93ba..33efc22 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "openwhisk",
-  "version": "3.21.5",
+  "version": "3.21.6",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index d576f34..9166443 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openwhisk",
-  "version": "3.21.5",
+  "version": "3.21.6",
   "description": "JavaScript client library for the Apache OpenWhisk platform",
   "main": "lib/main.js",
   "typings": "lib/main.d.ts",