diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e3aca3535..1cab85ff3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## master
+## 6.0.1 Sep 18, 2021
 
 Upgrade priority: Low. Recommended for users of the latest Substrate/Polkadot with Metadata v14.
 
diff --git a/package.json b/package.json
index b7188200c3..bdc12c67b9 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,6 @@
     "@types/jest": "^27.0.1",
     "copyfiles": "^2.4.1"
   },
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "packageManager": "yarn@3.0.1"
 }
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index 8cec38e5b3..9afa9c33a0 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
@@ -20,8 +20,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.15.4",
-    "@polkadot/api": "5.9.2-10",
-    "@polkadot/types": "5.9.2-10",
+    "@polkadot/api": "6.0.0",
+    "@polkadot/types": "6.0.0",
     "@polkadot/util": "^7.4.1",
     "rxjs": "^7.3.0"
   }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index 607da0eab3..038c79adbc 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
@@ -20,15 +20,15 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.15.4",
-    "@polkadot/api": "5.9.2-10",
-    "@polkadot/rpc-core": "5.9.2-10",
-    "@polkadot/types": "5.9.2-10",
+    "@polkadot/api": "6.0.0",
+    "@polkadot/rpc-core": "6.0.0",
+    "@polkadot/types": "6.0.0",
     "@polkadot/util": "^7.4.1",
     "@polkadot/util-crypto": "^7.4.1",
     "rxjs": "^7.3.0"
   },
   "devDependencies": {
     "@polkadot/keyring": "^7.4.1",
-    "@polkadot/rpc-provider": "5.9.2-10"
+    "@polkadot/rpc-provider": "6.0.0"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index d295af695a..f83b1be8c5 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
@@ -20,12 +20,12 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.15.4",
-    "@polkadot/api-derive": "5.9.2-10",
+    "@polkadot/api-derive": "6.0.0",
     "@polkadot/keyring": "^7.4.1",
-    "@polkadot/rpc-core": "5.9.2-10",
-    "@polkadot/rpc-provider": "5.9.2-10",
-    "@polkadot/types": "5.9.2-10",
-    "@polkadot/types-known": "5.9.2-10",
+    "@polkadot/rpc-core": "6.0.0",
+    "@polkadot/rpc-provider": "6.0.0",
+    "@polkadot/types": "6.0.0",
+    "@polkadot/types-known": "6.0.0",
     "@polkadot/util": "^7.4.1",
     "@polkadot/util-crypto": "^7.4.1",
     "eventemitter3": "^4.0.7",
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 5df4e1d623..5e4c6c83a6 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
@@ -20,8 +20,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.15.4",
-    "@polkadot/rpc-provider": "5.9.2-10",
-    "@polkadot/types": "5.9.2-10",
+    "@polkadot/rpc-provider": "6.0.0",
+    "@polkadot/types": "6.0.0",
     "@polkadot/util": "^7.4.1",
     "rxjs": "^7.3.0"
   },
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 0a58f30964..aaedcc4ee9 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Transport providers for the API",
   "main": "index.js",
@@ -20,7 +20,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.15.4",
-    "@polkadot/types": "5.9.2-10",
+    "@polkadot/types": "6.0.0",
     "@polkadot/util": "^7.4.1",
     "@polkadot/util-crypto": "^7.4.1",
     "@polkadot/x-fetch": "^7.4.1",
@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^7.4.1",
-    "@polkadot/types": "5.9.2-10",
+    "@polkadot/types": "6.0.0",
     "mock-socket": "^9.0.3",
     "nock": "^13.1.3"
   }
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index 10af0bb770..325e37834e 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/typegen",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Type generation scripts",
   "main": "index.js",
@@ -29,10 +29,10 @@
     "@babel/core": "^7.15.5",
     "@babel/register": "^7.15.3",
     "@babel/runtime": "^7.15.4",
-    "@polkadot/api": "5.9.2-10",
-    "@polkadot/rpc-provider": "5.9.2-10",
-    "@polkadot/types": "5.9.2-10",
-    "@polkadot/types-support": "5.9.2-10",
+    "@polkadot/api": "6.0.0",
+    "@polkadot/rpc-provider": "6.0.0",
+    "@polkadot/types": "6.0.0",
+    "@polkadot/types-support": "6.0.0",
     "@polkadot/util": "^7.4.1",
     "handlebars": "^4.7.7",
     "websocket": "^1.0.34",
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index c63d6c6567..9d6c64da14 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-known",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Known type definitions",
   "main": "index.js",
@@ -21,7 +21,7 @@
   "dependencies": {
     "@babel/runtime": "^7.15.4",
     "@polkadot/networks": "^7.4.1",
-    "@polkadot/types": "5.9.2-10",
+    "@polkadot/types": "6.0.0",
     "@polkadot/util": "^7.4.1"
   }
 }
diff --git a/packages/types-support/package.json b/packages/types-support/package.json
index e44d643d18..91ae16d464 100644
--- a/packages/types-support/package.json
+++ b/packages/types-support/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-support",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Supporting files for types, mostly for testing",
   "main": "index.js",
diff --git a/packages/types/package.json b/packages/types/package.json
index 5d3ce8b250..f83a5b4970 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "5.9.2-10",
+  "version": "6.0.0",
   "type": "module",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
@@ -26,7 +26,7 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^7.4.1",
-    "@polkadot/types-support": "5.9.2-10",
+    "@polkadot/types-support": "6.0.0",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^4.12.0"
   }
diff --git a/yarn.lock b/yarn.lock
index e228c9fdf4..08b99f20f3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1854,40 +1854,40 @@ __metadata:
   resolution: "@polkadot/api-contract@workspace:packages/api-contract"
   dependencies:
     "@babel/runtime": ^7.15.4
-    "@polkadot/api": 5.9.2-10
-    "@polkadot/types": 5.9.2-10
+    "@polkadot/api": 6.0.0
+    "@polkadot/types": 6.0.0
     "@polkadot/util": ^7.4.1
     rxjs: ^7.3.0
   languageName: unknown
   linkType: soft
 
-"@polkadot/api-derive@5.9.2-10, @polkadot/api-derive@workspace:packages/api-derive":
+"@polkadot/api-derive@6.0.0, @polkadot/api-derive@workspace:packages/api-derive":
   version: 0.0.0-use.local
   resolution: "@polkadot/api-derive@workspace:packages/api-derive"
   dependencies:
     "@babel/runtime": ^7.15.4
-    "@polkadot/api": 5.9.2-10
+    "@polkadot/api": 6.0.0
     "@polkadot/keyring": ^7.4.1
-    "@polkadot/rpc-core": 5.9.2-10
-    "@polkadot/rpc-provider": 5.9.2-10
-    "@polkadot/types": 5.9.2-10
+    "@polkadot/rpc-core": 6.0.0
+    "@polkadot/rpc-provider": 6.0.0
+    "@polkadot/types": 6.0.0
     "@polkadot/util": ^7.4.1
     "@polkadot/util-crypto": ^7.4.1
     rxjs: ^7.3.0
   languageName: unknown
   linkType: soft
 
-"@polkadot/api@5.9.2-10, @polkadot/api@workspace:packages/api":
+"@polkadot/api@6.0.0, @polkadot/api@workspace:packages/api":
   version: 0.0.0-use.local
   resolution: "@polkadot/api@workspace:packages/api"
   dependencies:
     "@babel/runtime": ^7.15.4
-    "@polkadot/api-derive": 5.9.2-10
+    "@polkadot/api-derive": 6.0.0
     "@polkadot/keyring": ^7.4.1
-    "@polkadot/rpc-core": 5.9.2-10
-    "@polkadot/rpc-provider": 5.9.2-10
-    "@polkadot/types": 5.9.2-10
-    "@polkadot/types-known": 5.9.2-10
+    "@polkadot/rpc-core": 6.0.0
+    "@polkadot/rpc-provider": 6.0.0
+    "@polkadot/types": 6.0.0
+    "@polkadot/types-known": 6.0.0
     "@polkadot/util": ^7.4.1
     "@polkadot/util-crypto": ^7.4.1
     eventemitter3: ^4.0.7
@@ -2012,26 +2012,26 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/rpc-core@5.9.2-10, @polkadot/rpc-core@workspace:packages/rpc-core":
+"@polkadot/rpc-core@6.0.0, @polkadot/rpc-core@workspace:packages/rpc-core":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-core@workspace:packages/rpc-core"
   dependencies:
     "@babel/runtime": ^7.15.4
     "@polkadot/keyring": ^7.4.1
-    "@polkadot/rpc-provider": 5.9.2-10
-    "@polkadot/types": 5.9.2-10
+    "@polkadot/rpc-provider": 6.0.0
+    "@polkadot/types": 6.0.0
     "@polkadot/util": ^7.4.1
     rxjs: ^7.3.0
   languageName: unknown
   linkType: soft
 
-"@polkadot/rpc-provider@5.9.2-10, @polkadot/rpc-provider@workspace:packages/rpc-provider":
+"@polkadot/rpc-provider@6.0.0, @polkadot/rpc-provider@workspace:packages/rpc-provider":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-provider@workspace:packages/rpc-provider"
   dependencies:
     "@babel/runtime": ^7.15.4
     "@polkadot/keyring": ^7.4.1
-    "@polkadot/types": 5.9.2-10
+    "@polkadot/types": 6.0.0
     "@polkadot/util": ^7.4.1
     "@polkadot/util-crypto": ^7.4.1
     "@polkadot/x-fetch": ^7.4.1
@@ -2059,10 +2059,10 @@ __metadata:
     "@babel/core": ^7.15.5
     "@babel/register": ^7.15.3
     "@babel/runtime": ^7.15.4
-    "@polkadot/api": 5.9.2-10
-    "@polkadot/rpc-provider": 5.9.2-10
-    "@polkadot/types": 5.9.2-10
-    "@polkadot/types-support": 5.9.2-10
+    "@polkadot/api": 6.0.0
+    "@polkadot/rpc-provider": 6.0.0
+    "@polkadot/types": 6.0.0
+    "@polkadot/types-support": 6.0.0
     "@polkadot/util": ^7.4.1
     "@types/websocket": ^1.0.4
     "@types/yargs": ^17.0.2
@@ -2078,18 +2078,18 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/types-known@5.9.2-10, @polkadot/types-known@workspace:packages/types-known":
+"@polkadot/types-known@6.0.0, @polkadot/types-known@workspace:packages/types-known":
   version: 0.0.0-use.local
   resolution: "@polkadot/types-known@workspace:packages/types-known"
   dependencies:
     "@babel/runtime": ^7.15.4
     "@polkadot/networks": ^7.4.1
-    "@polkadot/types": 5.9.2-10
+    "@polkadot/types": 6.0.0
     "@polkadot/util": ^7.4.1
   languageName: unknown
   linkType: soft
 
-"@polkadot/types-support@5.9.2-10, @polkadot/types-support@workspace:packages/types-support":
+"@polkadot/types-support@6.0.0, @polkadot/types-support@workspace:packages/types-support":
   version: 0.0.0-use.local
   resolution: "@polkadot/types-support@workspace:packages/types-support"
   dependencies:
@@ -2098,13 +2098,13 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/types@5.9.2-10, @polkadot/types@workspace:packages/types":
+"@polkadot/types@6.0.0, @polkadot/types@workspace:packages/types":
   version: 0.0.0-use.local
   resolution: "@polkadot/types@workspace:packages/types"
   dependencies:
     "@babel/runtime": ^7.15.4
     "@polkadot/keyring": ^7.4.1
-    "@polkadot/types-support": 5.9.2-10
+    "@polkadot/types-support": 6.0.0
     "@polkadot/util": ^7.4.1
     "@polkadot/util-crypto": ^7.4.1
     "@types/bn.js": ^4.11.6