diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee100a5d2c..1b99c2ae51 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # CHANGELOG
 
+## 4.6.2 Apr 19, 2021
+
+Upgrade priority: Low.
+
+Changes:
+
+- Correct Kusama/Polkadot runtime 30 session key definitions
+
+
 ## 4.6.1 Apr 19, 2021
 
 Upgrade priority: Low. Recommended if used in a Node.js 15.x environment.
diff --git a/package.json b/package.json
index f97c66f09b..5f2d7e56cc 100644
--- a/package.json
+++ b/package.json
@@ -34,5 +34,5 @@
     "@types/jest": "^26.0.22",
     "copyfiles": "^2.4.1"
   },
-  "version": "4.6.1"
+  "version": "4.6.2"
 }
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index 35948daab6..c6837d2e94 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
@@ -17,8 +17,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.13.10",
-    "@polkadot/api": "4.6.1",
-    "@polkadot/types": "4.6.1",
+    "@polkadot/api": "4.6.2",
+    "@polkadot/types": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "@polkadot/x-rxjs": "^6.2.1",
     "bn.js": "^4.11.9"
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index d644a595c2..93ba23a106 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
@@ -17,9 +17,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.13.10",
-    "@polkadot/api": "4.6.1",
-    "@polkadot/rpc-core": "4.6.1",
-    "@polkadot/types": "4.6.1",
+    "@polkadot/api": "4.6.2",
+    "@polkadot/rpc-core": "4.6.2",
+    "@polkadot/types": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "@polkadot/util-crypto": "^6.2.1",
     "@polkadot/x-rxjs": "^6.2.1",
@@ -27,6 +27,6 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^6.2.1",
-    "@polkadot/rpc-provider": "4.6.1"
+    "@polkadot/rpc-provider": "4.6.2"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index 2ac13a588c..12262aa464 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
@@ -17,13 +17,13 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.13.10",
-    "@polkadot/api-derive": "4.6.1",
+    "@polkadot/api-derive": "4.6.2",
     "@polkadot/keyring": "^6.2.1",
-    "@polkadot/metadata": "4.6.1",
-    "@polkadot/rpc-core": "4.6.1",
-    "@polkadot/rpc-provider": "4.6.1",
-    "@polkadot/types": "4.6.1",
-    "@polkadot/types-known": "4.6.1",
+    "@polkadot/metadata": "4.6.2",
+    "@polkadot/rpc-core": "4.6.2",
+    "@polkadot/rpc-provider": "4.6.2",
+    "@polkadot/types": "4.6.2",
+    "@polkadot/types-known": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "@polkadot/util-crypto": "^6.2.1",
     "@polkadot/x-rxjs": "^6.2.1",
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index 869667ebee..cc5ae05e44 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/metadata",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
@@ -17,8 +17,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
     "@babel/runtime": "^7.13.10",
-    "@polkadot/types": "4.6.1",
-    "@polkadot/types-known": "4.6.1",
+    "@polkadot/types": "4.6.2",
+    "@polkadot/types-known": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "@polkadot/util-crypto": "^6.2.1",
     "bn.js": "^4.11.9"
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 7190c70f10..7a6e9bf33d 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
@@ -17,9 +17,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.13.10",
-    "@polkadot/metadata": "4.6.1",
-    "@polkadot/rpc-provider": "4.6.1",
-    "@polkadot/types": "4.6.1",
+    "@polkadot/metadata": "4.6.2",
+    "@polkadot/rpc-provider": "4.6.2",
+    "@polkadot/types": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "@polkadot/x-rxjs": "^6.2.1"
   },
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 2c056f89fd..ae2a664193 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "Transport providers for the API",
   "main": "index.js",
@@ -17,7 +17,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.13.10",
-    "@polkadot/types": "4.6.1",
+    "@polkadot/types": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "@polkadot/util-crypto": "^6.2.1",
     "@polkadot/x-fetch": "^6.2.1",
@@ -28,7 +28,7 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^6.2.1",
-    "@polkadot/metadata": "4.6.1",
+    "@polkadot/metadata": "4.6.2",
     "mock-socket": "^9.0.3",
     "nock": "^13.0.11"
   }
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index 6bc970c9ae..4b9f886b24 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/typegen",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "Type generation scripts",
   "main": "index.js",
@@ -26,10 +26,10 @@
     "@babel/core": "^7.13.15",
     "@babel/register": "^7.13.14",
     "@babel/runtime": "^7.13.10",
-    "@polkadot/api": "4.6.1",
-    "@polkadot/metadata": "4.6.1",
-    "@polkadot/rpc-provider": "4.6.1",
-    "@polkadot/types": "4.6.1",
+    "@polkadot/api": "4.6.2",
+    "@polkadot/metadata": "4.6.2",
+    "@polkadot/rpc-provider": "4.6.2",
+    "@polkadot/types": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "handlebars": "^4.7.7",
     "websocket": "^1.0.34",
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index 430781994d..f2d06c03d9 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-known",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
@@ -18,7 +18,7 @@
   "dependencies": {
     "@babel/runtime": "^7.13.10",
     "@polkadot/networks": "^6.2.1",
-    "@polkadot/types": "4.6.1",
+    "@polkadot/types": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "bn.js": "^4.11.9"
   },
diff --git a/packages/types-known/src/spec/kusama.ts b/packages/types-known/src/spec/kusama.ts
index 57539ce409..3cd4f66b86 100644
--- a/packages/types-known/src/spec/kusama.ts
+++ b/packages/types-known/src/spec/kusama.ts
@@ -6,14 +6,10 @@
 import type { OverrideVersionedType } from '@polkadot/types/types';
 
 const sharedTypes = {
-  AccountInfo: 'AccountInfoWithDualRefCount',
-  Address: 'MultiAddress',
-  Keys: 'SessionKeys7B',
-  LookupSource: 'MultiAddress',
+  Keys: 'SessionKeys6',
   ProxyType: {
     _enum: ['Any', 'NonTransfer', 'Governance', 'Staking', 'IdentityJudgement', 'CancelProxy']
-  },
-  ValidatorPrefs: 'ValidatorPrefsWithBlocked'
+  }
 };
 
 const addrIndicesTypes = {
@@ -168,7 +164,7 @@ const versioned: OverrideVersionedType[] = [
     minmax: [2028, 2029],
     types: {
       ...sharedTypes,
-      Keys: 'SessionKeys6'
+      AccountInfo: 'AccountInfoWithDualRefCount'
     }
   },
   {
diff --git a/packages/types-known/src/spec/polkadot.ts b/packages/types-known/src/spec/polkadot.ts
index 7da1c03a03..84e9c35d0c 100644
--- a/packages/types-known/src/spec/polkadot.ts
+++ b/packages/types-known/src/spec/polkadot.ts
@@ -6,10 +6,7 @@
 import type { OverrideVersionedType } from '@polkadot/types/types';
 
 const sharedTypes = {
-  AccountInfo: 'AccountInfoWithDualRefCount',
-  Address: 'MultiAddress',
-  Keys: 'SessionKeys7B',
-  LookupSource: 'MultiAddress',
+  Keys: 'SessionKeys6',
   ProxyType: {
     _enum: {
       Any: 0,
@@ -20,8 +17,7 @@ const sharedTypes = {
       IdentityJudgement: 5,
       CancelProxy: 6
     }
-  },
-  ValidatorPrefs: 'ValidatorPrefsWithBlocked'
+  }
 };
 
 const addrAccountIdTypes = {
@@ -72,7 +68,7 @@ const versioned: OverrideVersionedType[] = [
     minmax: [28, 29],
     types: {
       ...sharedTypes,
-      Keys: 'SessionKeys6'
+      AccountInfo: 'AccountInfoWithDualRefCount'
     }
   },
   {
diff --git a/packages/types/package.json b/packages/types/package.json
index f41ef7d4d7..411ca65901 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "4.6.1",
+  "version": "4.6.2",
   "type": "module",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
@@ -17,7 +17,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types#readme",
   "dependencies": {
     "@babel/runtime": "^7.13.10",
-    "@polkadot/metadata": "4.6.1",
+    "@polkadot/metadata": "4.6.2",
     "@polkadot/util": "^6.2.1",
     "@polkadot/util-crypto": "^6.2.1",
     "@polkadot/x-rxjs": "^6.2.1",
diff --git a/yarn.lock b/yarn.lock
index c57316e0b3..83e580ab17 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1790,24 +1790,24 @@ __metadata:
   resolution: "@polkadot/api-contract@workspace:packages/api-contract"
   dependencies:
     "@babel/runtime": ^7.13.10
-    "@polkadot/api": 4.6.1
-    "@polkadot/types": 4.6.1
+    "@polkadot/api": 4.6.2
+    "@polkadot/types": 4.6.2
     "@polkadot/util": ^6.2.1
     "@polkadot/x-rxjs": ^6.2.1
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api-derive@4.6.1, @polkadot/api-derive@workspace:packages/api-derive":
+"@polkadot/api-derive@4.6.2, @polkadot/api-derive@workspace:packages/api-derive":
   version: 0.0.0-use.local
   resolution: "@polkadot/api-derive@workspace:packages/api-derive"
   dependencies:
     "@babel/runtime": ^7.13.10
-    "@polkadot/api": 4.6.1
+    "@polkadot/api": 4.6.2
     "@polkadot/keyring": ^6.2.1
-    "@polkadot/rpc-core": 4.6.1
-    "@polkadot/rpc-provider": 4.6.1
-    "@polkadot/types": 4.6.1
+    "@polkadot/rpc-core": 4.6.2
+    "@polkadot/rpc-provider": 4.6.2
+    "@polkadot/types": 4.6.2
     "@polkadot/util": ^6.2.1
     "@polkadot/util-crypto": ^6.2.1
     "@polkadot/x-rxjs": ^6.2.1
@@ -1815,18 +1815,18 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/api@4.6.1, @polkadot/api@workspace:packages/api":
+"@polkadot/api@4.6.2, @polkadot/api@workspace:packages/api":
   version: 0.0.0-use.local
   resolution: "@polkadot/api@workspace:packages/api"
   dependencies:
     "@babel/runtime": ^7.13.10
-    "@polkadot/api-derive": 4.6.1
+    "@polkadot/api-derive": 4.6.2
     "@polkadot/keyring": ^6.2.1
-    "@polkadot/metadata": 4.6.1
-    "@polkadot/rpc-core": 4.6.1
-    "@polkadot/rpc-provider": 4.6.1
-    "@polkadot/types": 4.6.1
-    "@polkadot/types-known": 4.6.1
+    "@polkadot/metadata": 4.6.2
+    "@polkadot/rpc-core": 4.6.2
+    "@polkadot/rpc-provider": 4.6.2
+    "@polkadot/types": 4.6.2
+    "@polkadot/types-known": 4.6.2
     "@polkadot/util": ^6.2.1
     "@polkadot/util-crypto": ^6.2.1
     "@polkadot/x-rxjs": ^6.2.1
@@ -1935,14 +1935,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/metadata@4.6.1, @polkadot/metadata@workspace:packages/metadata":
+"@polkadot/metadata@4.6.2, @polkadot/metadata@workspace:packages/metadata":
   version: 0.0.0-use.local
   resolution: "@polkadot/metadata@workspace:packages/metadata"
   dependencies:
     "@babel/runtime": ^7.13.10
     "@polkadot/keyring": ^6.2.1
-    "@polkadot/types": 4.6.1
-    "@polkadot/types-known": 4.6.1
+    "@polkadot/types": 4.6.2
+    "@polkadot/types-known": 4.6.2
     "@polkadot/util": ^6.2.1
     "@polkadot/util-crypto": ^6.2.1
     bn.js: ^4.11.9
@@ -1958,28 +1958,28 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/rpc-core@4.6.1, @polkadot/rpc-core@workspace:packages/rpc-core":
+"@polkadot/rpc-core@4.6.2, @polkadot/rpc-core@workspace:packages/rpc-core":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-core@workspace:packages/rpc-core"
   dependencies:
     "@babel/runtime": ^7.13.10
     "@polkadot/keyring": ^6.2.1
-    "@polkadot/metadata": 4.6.1
-    "@polkadot/rpc-provider": 4.6.1
-    "@polkadot/types": 4.6.1
+    "@polkadot/metadata": 4.6.2
+    "@polkadot/rpc-provider": 4.6.2
+    "@polkadot/types": 4.6.2
     "@polkadot/util": ^6.2.1
     "@polkadot/x-rxjs": ^6.2.1
   languageName: unknown
   linkType: soft
 
-"@polkadot/rpc-provider@4.6.1, @polkadot/rpc-provider@workspace:packages/rpc-provider":
+"@polkadot/rpc-provider@4.6.2, @polkadot/rpc-provider@workspace:packages/rpc-provider":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-provider@workspace:packages/rpc-provider"
   dependencies:
     "@babel/runtime": ^7.13.10
     "@polkadot/keyring": ^6.2.1
-    "@polkadot/metadata": 4.6.1
-    "@polkadot/types": 4.6.1
+    "@polkadot/metadata": 4.6.2
+    "@polkadot/types": 4.6.2
     "@polkadot/util": ^6.2.1
     "@polkadot/util-crypto": ^6.2.1
     "@polkadot/x-fetch": ^6.2.1
@@ -2008,10 +2008,10 @@ __metadata:
     "@babel/core": ^7.13.15
     "@babel/register": ^7.13.14
     "@babel/runtime": ^7.13.10
-    "@polkadot/api": 4.6.1
-    "@polkadot/metadata": 4.6.1
-    "@polkadot/rpc-provider": 4.6.1
-    "@polkadot/types": 4.6.1
+    "@polkadot/api": 4.6.2
+    "@polkadot/metadata": 4.6.2
+    "@polkadot/rpc-provider": 4.6.2
+    "@polkadot/types": 4.6.2
     "@polkadot/util": ^6.2.1
     "@types/websocket": ^1.0.2
     "@types/yargs": ^16.0.1
@@ -2027,26 +2027,26 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/types-known@4.6.1, @polkadot/types-known@workspace:packages/types-known":
+"@polkadot/types-known@4.6.2, @polkadot/types-known@workspace:packages/types-known":
   version: 0.0.0-use.local
   resolution: "@polkadot/types-known@workspace:packages/types-known"
   dependencies:
     "@babel/runtime": ^7.13.10
     "@polkadot/networks": ^6.2.1
-    "@polkadot/types": 4.6.1
+    "@polkadot/types": 4.6.2
     "@polkadot/util": ^6.2.1
     "@types/bn.js": ^4.11.6
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/types@4.6.1, @polkadot/types@workspace:packages/types":
+"@polkadot/types@4.6.2, @polkadot/types@workspace:packages/types":
   version: 0.0.0-use.local
   resolution: "@polkadot/types@workspace:packages/types"
   dependencies:
     "@babel/runtime": ^7.13.10
     "@polkadot/keyring": ^6.2.1
-    "@polkadot/metadata": 4.6.1
+    "@polkadot/metadata": 4.6.2
     "@polkadot/util": ^6.2.1
     "@polkadot/util-crypto": ^6.2.1
     "@polkadot/x-rxjs": ^6.2.1