diff --git a/docs/METHODS_RPC.md b/docs/METHODS_RPC.md
index d817695dcb..decb801cc2 100644
--- a/docs/METHODS_RPC.md
+++ b/docs/METHODS_RPC.md
@@ -17,7 +17,7 @@ ___
 
 _Authoring of network items_
 
-▸ **insertKey**(keyType: `Text`, suri: `Text`, maybePublic?: `Bytes`): `Bytes`
+▸ **insertKey**(keyType: `Text`, suri: `Text`, publicKey: `Bytes`): `Bytes`
 - **summary**: Insert a key into the keystore.
 
 ▸ **pendingExtrinsics**(): `Vec<Extrinsic>`
diff --git a/lerna.json b/lerna.json
index f49d0238dc..29535c9a2e 100644
--- a/lerna.json
+++ b/lerna.json
@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.91.0-beta.18"
+  "version": "0.91.0-beta.19"
 }
diff --git a/package.json b/package.json
index 1a5312b124..2fa16f5f4c 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.91.0-beta.18",
+  "version": "0.91.0-beta.19",
   "private": true,
   "engines": {
     "yarn": "^1.10.1"
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index 1b85452077..beda657a8e 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.18",
+  "version": "0.91.0-beta.19",
   "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.18"
+    "@polkadot/types": "^0.91.0-beta.19"
   }
 }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index d594d3c6de..ce98b1d32d 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.18",
+  "version": "0.91.0-beta.19",
   "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.18",
-    "@polkadot/types": "^0.91.0-beta.18"
+    "@polkadot/api": "^0.91.0-beta.19",
+    "@polkadot/types": "^0.91.0-beta.19"
   },
   "devDependencies": {
     "@polkadot/keyring": "^1.2.0-beta.6"
diff --git a/packages/api-metadata/package.json b/packages/api-metadata/package.json
index 6f3f292c30..0c997868cb 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.18",
+  "version": "0.91.0-beta.19",
   "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.18",
+    "@polkadot/types": "^0.91.0-beta.19",
     "@polkadot/util": "^1.2.0-beta.6",
     "@polkadot/util-crypto": "^1.2.0-beta.6"
   },
diff --git a/packages/api/package.json b/packages/api/package.json
index 6ebb63777b..7e82b9e06a 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "0.91.0-beta.18",
+  "version": "0.91.0-beta.19",
   "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.18",
-    "@polkadot/api-metadata": "^0.91.0-beta.18",
-    "@polkadot/rpc-core": "^0.91.0-beta.18",
-    "@polkadot/rpc-provider": "^0.91.0-beta.18",
-    "@polkadot/types": "^0.91.0-beta.18",
+    "@polkadot/api-derive": "^0.91.0-beta.19",
+    "@polkadot/api-metadata": "^0.91.0-beta.19",
+    "@polkadot/rpc-core": "^0.91.0-beta.19",
+    "@polkadot/rpc-provider": "^0.91.0-beta.19",
+    "@polkadot/types": "^0.91.0-beta.19",
     "@polkadot/util-crypto": "^1.2.0-beta.6"
   },
   "devDependencies": {
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 778f9d76bd..0bb463e8cc 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.18",
+  "version": "0.91.0-beta.19",
   "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.18",
-    "@polkadot/rpc-provider": "^0.91.0-beta.18",
-    "@polkadot/types": "^0.91.0-beta.18",
+    "@polkadot/jsonrpc": "^0.91.0-beta.19",
+    "@polkadot/rpc-provider": "^0.91.0-beta.19",
+    "@polkadot/types": "^0.91.0-beta.19",
     "@polkadot/util": "^1.2.0-beta.6",
     "rxjs": "^6.5.2"
   }
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 5e101d2661..670b95de37 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.18",
+  "version": "0.91.0-beta.19",
   "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.18",
+    "@polkadot/api-metadata": "^0.91.0-beta.19",
     "@polkadot/util": "^1.2.0-beta.6",
     "@polkadot/util-crypto": "^1.2.0-beta.6",
     "@types/nock": "^10.0.3",
diff --git a/packages/type-jsonrpc/package.json b/packages/type-jsonrpc/package.json
index acc1a9fa59..16c3b0187f 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.18",
+  "version": "0.91.0-beta.19",
   "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 b9697a34b3..554ccea242 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "0.91.0-beta.18",
+  "version": "0.91.0-beta.19",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "keywords": [