diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72e0839f5e..be9fb0d999 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,15 @@
 # CHANGELOG
 
-## master
+## 4.13.1 Jun 6, 2021
+
+Upgrade priority: Medium. Required for users connecting to Statemine and future Kusama upgrades.
 
 Changes:
 
 - Overrides for `westmint` spec (same as `statemint`)
 - Adjust `tx.session.setKeys` TS augmentation to allow `string` & `Uint8Array` keys
 - Add & adjust types for latest Cumulus code
-- Added 9031 upgrade block for Westend
+- Added 9031-9033 upgrade block for Westend
 - Update static metadata to latest Substrate
 - Optimize map retrieval with split page sizes for keys & values
 - Sanitizing `BN` imports to `type`-only as required
diff --git a/package.json b/package.json
index 01e84a571e..8808f70645 100644
--- a/package.json
+++ b/package.json
@@ -28,11 +28,11 @@
     "@babel/core": "^7.14.3",
     "@babel/register": "^7.13.16",
     "@babel/runtime": "^7.14.0",
-    "@polkadot/dev": "^0.62.33",
-    "@polkadot/ts": "^0.3.81",
+    "@polkadot/dev": "^0.62.38",
+    "@polkadot/ts": "^0.3.86",
     "@polkadot/typegen": "workspace:packages/typegen",
     "@types/jest": "^26.0.23",
     "copyfiles": "^2.4.1"
   },
-  "version": "4.12.2-20"
+  "version": "4.13.0"
 }
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index 24456989c1..3b72f944d7 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
@@ -20,10 +20,10 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/api": "4.12.2-20",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
-    "@polkadot/x-rxjs": "^6.6.2-13",
+    "@polkadot/api": "4.13.0",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/util": "^6.7.1",
+    "@polkadot/x-rxjs": "^6.7.1",
     "bn.js": "^4.11.9"
   }
 }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index fa73ab1257..a278280552 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
@@ -20,16 +20,16 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/api": "4.12.2-20",
-    "@polkadot/rpc-core": "4.12.2-20",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
-    "@polkadot/util-crypto": "^6.6.2-13",
-    "@polkadot/x-rxjs": "^6.6.2-13",
+    "@polkadot/api": "4.13.0",
+    "@polkadot/rpc-core": "4.13.0",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/util": "^6.7.1",
+    "@polkadot/util-crypto": "^6.7.1",
+    "@polkadot/x-rxjs": "^6.7.1",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^6.6.2-13",
-    "@polkadot/rpc-provider": "4.12.2-20"
+    "@polkadot/keyring": "^6.7.1",
+    "@polkadot/rpc-provider": "4.13.0"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index 8a06184b4e..3efbb4875a 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
@@ -20,16 +20,16 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/api-derive": "4.12.2-20",
-    "@polkadot/keyring": "^6.6.2-13",
-    "@polkadot/metadata": "4.12.2-20",
-    "@polkadot/rpc-core": "4.12.2-20",
-    "@polkadot/rpc-provider": "4.12.2-20",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/types-known": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
-    "@polkadot/util-crypto": "^6.6.2-13",
-    "@polkadot/x-rxjs": "^6.6.2-13",
+    "@polkadot/api-derive": "4.13.0",
+    "@polkadot/keyring": "^6.7.1",
+    "@polkadot/metadata": "4.13.0",
+    "@polkadot/rpc-core": "4.13.0",
+    "@polkadot/rpc-provider": "4.13.0",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/types-known": "4.13.0",
+    "@polkadot/util": "^6.7.1",
+    "@polkadot/util-crypto": "^6.7.1",
+    "@polkadot/x-rxjs": "^6.7.1",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
   }
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index 04dbd43587..9d0c7d5e0f 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/metadata",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
@@ -20,13 +20,13 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/types-known": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
-    "@polkadot/util-crypto": "^6.6.2-13",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/types-known": "4.13.0",
+    "@polkadot/util": "^6.7.1",
+    "@polkadot/util-crypto": "^6.7.1",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^6.6.2-13"
+    "@polkadot/keyring": "^6.7.1"
   }
 }
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 5361aafdb9..a4bf1e9e35 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
@@ -20,13 +20,13 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/metadata": "4.12.2-20",
-    "@polkadot/rpc-provider": "4.12.2-20",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
-    "@polkadot/x-rxjs": "^6.6.2-13"
+    "@polkadot/metadata": "4.13.0",
+    "@polkadot/rpc-provider": "4.13.0",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/util": "^6.7.1",
+    "@polkadot/x-rxjs": "^6.7.1"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^6.6.2-13"
+    "@polkadot/keyring": "^6.7.1"
   }
 }
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 34955f47d2..7623bab1f9 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "Transport providers for the API",
   "main": "index.js",
@@ -20,19 +20,19 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
-    "@polkadot/util-crypto": "^6.6.2-13",
-    "@polkadot/x-fetch": "^6.6.2-13",
-    "@polkadot/x-global": "^6.6.2-13",
-    "@polkadot/x-ws": "^6.6.2-13",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/util": "^6.7.1",
+    "@polkadot/util-crypto": "^6.7.1",
+    "@polkadot/x-fetch": "^6.7.1",
+    "@polkadot/x-global": "^6.7.1",
+    "@polkadot/x-ws": "^6.7.1",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^6.6.2-13",
-    "@polkadot/metadata": "4.12.2-20",
+    "@polkadot/keyring": "^6.7.1",
+    "@polkadot/metadata": "4.13.0",
     "mock-socket": "^9.0.3",
-    "nock": "^13.0.11"
+    "nock": "^13.1.0"
   }
 }
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index 5f3c4e5089..0d96b966e5 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/typegen",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "Type generation scripts",
   "main": "index.js",
@@ -29,11 +29,11 @@
     "@babel/core": "^7.14.3",
     "@babel/register": "^7.13.16",
     "@babel/runtime": "^7.14.0",
-    "@polkadot/api": "4.12.2-20",
-    "@polkadot/metadata": "4.12.2-20",
-    "@polkadot/rpc-provider": "4.12.2-20",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
+    "@polkadot/api": "4.13.0",
+    "@polkadot/metadata": "4.13.0",
+    "@polkadot/rpc-provider": "4.13.0",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/util": "^6.7.1",
     "handlebars": "^4.7.7",
     "websocket": "^1.0.34",
     "yargs": "^17.0.1"
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index b4dec85ca5..87123986ba 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-known",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
@@ -20,9 +20,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types-known#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/networks": "^6.6.2-13",
-    "@polkadot/types": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
+    "@polkadot/networks": "^6.7.1",
+    "@polkadot/types": "4.13.0",
+    "@polkadot/util": "^6.7.1",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
diff --git a/packages/types-known/src/upgrades/westend.ts b/packages/types-known/src/upgrades/westend.ts
index 4a949323f3..d0206a5e26 100644
--- a/packages/types-known/src/upgrades/westend.ts
+++ b/packages/types-known/src/upgrades/westend.ts
@@ -10,7 +10,7 @@ const upgrades: ChainUpgradesRaw = [
   [1431703, 36], [1433369, 37], [1490972, 41], [2087397, 43], [2316688, 44],
   [2549864, 45], [3925782, 46], [3925843, 47], [4207800, 48], [4627944, 49],
   [5124076, 50], [5478664, 900], [5482450, 9000], [5584305, 9010], [5784566, 9030],
-  [5879822, 9031]
+  [5879822, 9031], [5896856, 9032], [5897316, 9033]
 ];
 
 export default upgrades;
diff --git a/packages/types/package.json b/packages/types/package.json
index 02fb5f3f46..32cce9ebce 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "4.12.2-20",
+  "version": "4.13.0",
   "type": "module",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
@@ -20,14 +20,14 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types#readme",
   "dependencies": {
     "@babel/runtime": "^7.14.0",
-    "@polkadot/metadata": "4.12.2-20",
-    "@polkadot/util": "^6.6.2-13",
-    "@polkadot/util-crypto": "^6.6.2-13",
-    "@polkadot/x-rxjs": "^6.6.2-13",
+    "@polkadot/metadata": "4.13.0",
+    "@polkadot/util": "^6.7.1",
+    "@polkadot/util-crypto": "^6.7.1",
+    "@polkadot/x-rxjs": "^6.7.1",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^6.6.2-13"
+    "@polkadot/keyring": "^6.7.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index cc5b91d2aa..a3d758ab3c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1849,54 +1849,54 @@ __metadata:
   resolution: "@polkadot/api-contract@workspace:packages/api-contract"
   dependencies:
     "@babel/runtime": ^7.14.0
-    "@polkadot/api": 4.12.2-20
-    "@polkadot/types": 4.12.2-20
-    "@polkadot/util": ^6.6.2-13
-    "@polkadot/x-rxjs": ^6.6.2-13
+    "@polkadot/api": 4.13.0
+    "@polkadot/types": 4.13.0
+    "@polkadot/util": ^6.7.1
+    "@polkadot/x-rxjs": ^6.7.1
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api-derive@4.12.2-20, @polkadot/api-derive@workspace:packages/api-derive":
+"@polkadot/api-derive@4.13.0, @polkadot/api-derive@workspace:packages/api-derive":
   version: 0.0.0-use.local
   resolution: "@polkadot/api-derive@workspace:packages/api-derive"
   dependencies:
     "@babel/runtime": ^7.14.0
-    "@polkadot/api": 4.12.2-20
-    "@polkadot/keyring": ^6.6.2-13
-    "@polkadot/rpc-core": 4.12.2-20
-    "@polkadot/rpc-provider": 4.12.2-20
-    "@polkadot/types": 4.12.2-20
-    "@polkadot/util": ^6.6.2-13
-    "@polkadot/util-crypto": ^6.6.2-13
-    "@polkadot/x-rxjs": ^6.6.2-13
+    "@polkadot/api": 4.13.0
+    "@polkadot/keyring": ^6.7.1
+    "@polkadot/rpc-core": 4.13.0
+    "@polkadot/rpc-provider": 4.13.0
+    "@polkadot/types": 4.13.0
+    "@polkadot/util": ^6.7.1
+    "@polkadot/util-crypto": ^6.7.1
+    "@polkadot/x-rxjs": ^6.7.1
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api@4.12.2-20, @polkadot/api@workspace:packages/api":
+"@polkadot/api@4.13.0, @polkadot/api@workspace:packages/api":
   version: 0.0.0-use.local
   resolution: "@polkadot/api@workspace:packages/api"
   dependencies:
     "@babel/runtime": ^7.14.0
-    "@polkadot/api-derive": 4.12.2-20
-    "@polkadot/keyring": ^6.6.2-13
-    "@polkadot/metadata": 4.12.2-20
-    "@polkadot/rpc-core": 4.12.2-20
-    "@polkadot/rpc-provider": 4.12.2-20
-    "@polkadot/types": 4.12.2-20
-    "@polkadot/types-known": 4.12.2-20
-    "@polkadot/util": ^6.6.2-13
-    "@polkadot/util-crypto": ^6.6.2-13
-    "@polkadot/x-rxjs": ^6.6.2-13
+    "@polkadot/api-derive": 4.13.0
+    "@polkadot/keyring": ^6.7.1
+    "@polkadot/metadata": 4.13.0
+    "@polkadot/rpc-core": 4.13.0
+    "@polkadot/rpc-provider": 4.13.0
+    "@polkadot/types": 4.13.0
+    "@polkadot/types-known": 4.13.0
+    "@polkadot/util": ^6.7.1
+    "@polkadot/util-crypto": ^6.7.1
+    "@polkadot/x-rxjs": ^6.7.1
     bn.js: ^4.11.9
     eventemitter3: ^4.0.7
   languageName: unknown
   linkType: soft
 
-"@polkadot/dev@npm:^0.62.33":
-  version: 0.62.33
-  resolution: "@polkadot/dev@npm:0.62.33"
+"@polkadot/dev@npm:^0.62.38":
+  version: 0.62.38
+  resolution: "@polkadot/dev@npm:0.62.38"
   dependencies:
     "@babel/cli": ^7.14.3
     "@babel/core": ^7.14.3
@@ -1976,87 +1976,87 @@ __metadata:
     polkadot-exec-prettier: scripts/polkadot-exec-prettier.cjs
     polkadot-exec-tsc: scripts/polkadot-exec-tsc.cjs
     polkadot-exec-webpack: scripts/polkadot-exec-webpack.cjs
-  checksum: 6786184f9412cda46fd52817ed3baa3e1d79a294629a5aabbf6d5b5864bb67f6aec3d73d7c89cd01d1a578d3e7a0725e77ce741d8883a678dd29917166448f9a
+  checksum: 23056dae06336cb9bcbe3cab53c9c8d4d552d1010a43a124529705b1743524143e8b51550bd75ba2f65c18b3f28559890234c62eb6441f8481fc12832ed66d19
   languageName: node
   linkType: hard
 
-"@polkadot/keyring@npm:^6.6.2-13":
-  version: 6.6.2-13
-  resolution: "@polkadot/keyring@npm:6.6.2-13"
+"@polkadot/keyring@npm:^6.7.1":
+  version: 6.7.1
+  resolution: "@polkadot/keyring@npm:6.7.1"
   dependencies:
     "@babel/runtime": ^7.14.0
-    "@polkadot/util": 6.6.2-13
-    "@polkadot/util-crypto": 6.6.2-13
+    "@polkadot/util": 6.7.1
+    "@polkadot/util-crypto": 6.7.1
   peerDependencies:
-    "@polkadot/util": 6.6.2-13
-    "@polkadot/util-crypto": 6.6.2-13
-  checksum: 09dbe9b2da6740334b35d4746be54785e2aa7fc4ad721c4640ac932934c456ee55a0cda9237296b321a33a50739afc0cfa02122c84ee1b6ac9e3f9d5ac2f4382
+    "@polkadot/util": 6.7.1
+    "@polkadot/util-crypto": 6.7.1
+  checksum: 81f9079b2e4271643e00bbeb94a153985c5018bf22e7aec04568024510991ee8aefa0b7166c0017c0af6865914a9044b42621224a9959004f403e51b4a1a6a60
   languageName: node
   linkType: hard
 
-"@polkadot/metadata@4.12.2-20, @polkadot/metadata@workspace:packages/metadata":
+"@polkadot/metadata@4.13.0, @polkadot/metadata@workspace:packages/metadata":
   version: 0.0.0-use.local
   resolution: "@polkadot/metadata@workspace:packages/metadata"
   dependencies:
     "@babel/runtime": ^7.14.0
-    "@polkadot/keyring": ^6.6.2-13
-    "@polkadot/types": 4.12.2-20
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