diff --git a/lerna.json b/lerna.json
index b10ba1c2..4f4edaa5 100644
--- a/lerna.json
+++ b/lerna.json
@@ -4,5 +4,5 @@
   ],
   "npmClient": "yarn",
   "useWorkspaces": true,
-  "version": "^2.1.1-alpha.3"
+  "version": "^2.1.1-alpha.4"
 }
diff --git a/packages/api/CHANGELOG.md b/packages/api/CHANGELOG.md
index 48f2e465..b0ab0932 100644
--- a/packages/api/CHANGELOG.md
+++ b/packages/api/CHANGELOG.md
@@ -5,7 +5,10 @@ See [Conventional Commits](https://conventionalcommits.org) for commit guideline
 
 ## [UNRELEASED]
 Please check [upgrade guide](https://hackmd.io/VbsHZhKkTiWwaTBYp1Unbw) for 2.1.x  version
-## [2.1.1-alpha.3](https://github.com/cennznet/api.js/compare/prerelease/2.1.1-alpha.2...prerelease/2.1.1-alpha.1) (18/05/2022)
+## [2.1.1-alpha.4](https://github.com/cennznet/api.js/compare/prerelease/2.1.1-alpha.3...prerelease/2.1.1-alpha.4) (20/05/2022)
+### Changed:
+    - Updated the return type to JSON for nft rpc calls
+## [2.1.1-alpha.3](https://github.com/cennznet/api.js/compare/prerelease/2.1.1-alpha.2...prerelease/2.1.1-alpha.3) (18/05/2022)
 ### Changed:
     - base64Encode payload before signing via EthWallet
 ## [2.1.1-alpha.2](https://github.com/cennznet/api.js/compare/prerelease/2.1.1-alpha.1...prerelease/2.1.1-alpha.2) (05/05/2022)
diff --git a/packages/api/package.json b/packages/api/package.json
index e3e5143b..3031b13e 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cennznet/api",
-  "version": "2.1.1-alpha.3",
+  "version": "2.1.1-alpha.4",
   "description": "CENNZnet's javascript api",
   "keywords": [
     "CENNZnet"
@@ -23,7 +23,7 @@
     "doc": "npx compodoc --tsconfig ../../tsconfig.json --hideGenerator --theme readthedocs --includes compodoc --output ../../docs/api"
   },
   "dependencies": {
-    "@cennznet/types": "^2.1.1-alpha.3",
+    "@cennznet/types": "^2.1.1-alpha.4",
     "@depay/web3-blockchains": "^4.3.0",
     "@depay/web3-mock": "^11.7.0",
     "@ethersproject/keccak256": "^5.5.0",
diff --git a/packages/signer-cli/package.json b/packages/signer-cli/package.json
index 0012054f..11b6b495 100644
--- a/packages/signer-cli/package.json
+++ b/packages/signer-cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cennznet/signer-cli",
-  "version": "2.1.1-alpha.3",
+  "version": "2.1.1-alpha.4",
   "description": "A commandline signer for offline signature generation",
   "main": "index.cjs",
   "sideEffects": false,
@@ -20,7 +20,7 @@
     "@babel/core": "^7.14.8",
     "@babel/register": "^7.14.5",
     "@babel/runtime": "^7.14.8",
-    "@cennznet/api": "2.1.1-alpha.3",
+    "@cennznet/api": "2.1.1-alpha.4",
     "@polkadot/keyring": "8.3.3",
     "@polkadot/types": "^7.7.1",
     "@polkadot/util": "^8.3.3",
diff --git a/packages/types/package.json b/packages/types/package.json
index 29d3be27..612781f9 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@cennznet/types",
-    "version": "2.1.1-alpha.3",
+    "version": "2.1.1-alpha.4",
     "description": "Additional type definitions for the CENNZnet runtime",
     "author": "Centrality Developers <support@centrality.ai>",
     "keywords": [