diff --git a/lerna.json b/lerna.json
index 614683fa29..adce44e0a2 100644
--- a/lerna.json
+++ b/lerna.json
@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.91.0-beta.3"
+  "version": "0.91.0-beta.4"
 }
diff --git a/package.json b/package.json
index cea858a320..5402869a50 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "private": true,
   "engines": {
     "yarn": "^1.10.1"
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index 073c649acd..4214f4c221 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
   "keywords": [
@@ -27,6 +27,6 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.5.5",
-    "@polkadot/types": "^0.91.0-beta.3"
+    "@polkadot/types": "^0.91.0-beta.4"
   }
 }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index d819bd4157..710d7e7bb8 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
   "keywords": [
@@ -28,8 +28,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.5.5",
-    "@polkadot/api": "^0.91.0-beta.3",
-    "@polkadot/types": "^0.91.0-beta.3"
+    "@polkadot/api": "^0.91.0-beta.4",
+    "@polkadot/types": "^0.91.0-beta.4"
   },
   "devDependencies": {
     "@polkadot/keyring": "^1.1.1"
diff --git a/packages/api-metadata/package.json b/packages/api-metadata/package.json
index 7171e751a4..8d79e31117 100644
--- a/packages/api-metadata/package.json
+++ b/packages/api-metadata/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-metadata",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
   "publishConfig": {
@@ -27,7 +27,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
     "@babel/runtime": "^7.5.5",
-    "@polkadot/types": "^0.91.0-beta.3",
+    "@polkadot/types": "^0.91.0-beta.4",
     "@polkadot/util": "^1.1.1",
     "@polkadot/util-crypto": "^1.1.1"
   },
diff --git a/packages/api/package.json b/packages/api/package.json
index 85708b03b6..285f444625 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
   "keywords": [
@@ -27,11 +27,11 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.5.5",
-    "@polkadot/api-derive": "^0.91.0-beta.3",
-    "@polkadot/api-metadata": "^0.91.0-beta.3",
-    "@polkadot/rpc-core": "^0.91.0-beta.3",
-    "@polkadot/rpc-provider": "^0.91.0-beta.3",
-    "@polkadot/types": "^0.91.0-beta.3",
+    "@polkadot/api-derive": "^0.91.0-beta.4",
+    "@polkadot/api-metadata": "^0.91.0-beta.4",
+    "@polkadot/rpc-core": "^0.91.0-beta.4",
+    "@polkadot/rpc-provider": "^0.91.0-beta.4",
+    "@polkadot/types": "^0.91.0-beta.4",
     "@polkadot/util-crypto": "^1.1.1"
   },
   "devDependencies": {
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 1236befb4e..a15f62b619 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "keywords": [
@@ -27,9 +27,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.5.5",
-    "@polkadot/jsonrpc": "^0.91.0-beta.3",
-    "@polkadot/rpc-provider": "^0.91.0-beta.3",
-    "@polkadot/types": "^0.91.0-beta.3",
+    "@polkadot/jsonrpc": "^0.91.0-beta.4",
+    "@polkadot/rpc-provider": "^0.91.0-beta.4",
+    "@polkadot/types": "^0.91.0-beta.4",
     "@polkadot/util": "^1.1.1",
     "rxjs": "^6.5.2"
   }
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 07650ab0a3..ade0a28290 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "Transport providers for the API",
   "main": "index.js",
   "keywords": [
@@ -27,7 +27,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.5.5",
-    "@polkadot/api-metadata": "^0.91.0-beta.3",
+    "@polkadot/api-metadata": "^0.91.0-beta.4",
     "@polkadot/util": "^1.1.1",
     "@polkadot/util-crypto": "^1.1.1",
     "@types/nock": "^10.0.3",
diff --git a/packages/type-jsonrpc/package.json b/packages/type-jsonrpc/package.json
index bed51fa486..b52efccf63 100644
--- a/packages/type-jsonrpc/package.json
+++ b/packages/type-jsonrpc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/jsonrpc",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "Method definitions for the Polkadot RPC layer",
   "main": "index.js",
   "publishConfig": {
diff --git a/packages/types/package.json b/packages/types/package.json
index d2f3f95f5f..2eec65e8ea 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "0.91.0-beta.3",
+  "version": "0.91.0-beta.4",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "keywords": [