diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0ce4439f3..de5613e945 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,25 @@
 # CHANGELOG
 
+## 3.8.1 Feb 7, 2021
+
+Upgrade priority: Low. Recommended for users of the latest Substrate master, especially using contracts.
+
+- **Important** The `api-contract` `Code` now supports deploying the code and a contract in on operation. This aligns with the latest Substrate where code cannot be uploaded with a contract. The `createBlueprint` is therefore deprecated, use `code.tx.<constructor>(...)` to deploy code. (Compatible with both old and new versions of Substrate)
+
+Contributed:
+
+- Add support for latest Frontier RPCs (Thanks to https://github.com/jnaviask)
+- Fix user-supplied signed extensions type signature (Thanks to https://github.com/ntduan)
+
+Changes:
+
+- Expand `api-contract` to allow for `Code` to deploy contract alongside code. `createBlueprint` is now deprecated, replaced by `createContract` or the preferred `code.tx.<constructor>`, which uploads and deploys the code in one operation. This aligns with the current Substrate master contracts implementation.
+- Allow for signed extensions to be supplied inside type bundles
+- Ensure that the auto-connect state is checked on auto-connections (respecting disconnect)
+- Added `CancelProxy` to `ProxyTypes on Polkadot, Kusama & Westend
+- Updated to latest Substrate metadata
+
+
 ## 3.7.3 Feb 2, 2021
 
 Changes:
diff --git a/package.json b/package.json
index a9b2caa929..ce02ad1609 100644
--- a/package.json
+++ b/package.json
@@ -34,5 +34,5 @@
     "@types/jest": "^26.0.20",
     "copyfiles": "^2.4.1"
   },
-  "version": "3.7.4-8"
+  "version": "3.8.0"
 }
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index c723a1de0a..ba8e8ff396 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
   "sideEffects": false,
@@ -13,8 +13,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.13",
-    "@polkadot/api": "3.7.4-8",
-    "@polkadot/types": "3.7.4-8",
+    "@polkadot/api": "3.8.0",
+    "@polkadot/types": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "@polkadot/x-rxjs": "^5.6.1",
     "bn.js": "^4.11.9"
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index d0f5c2860d..8bd7086b8f 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
   "sideEffects": false,
@@ -13,9 +13,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.13",
-    "@polkadot/api": "3.7.4-8",
-    "@polkadot/rpc-core": "3.7.4-8",
-    "@polkadot/types": "3.7.4-8",
+    "@polkadot/api": "3.8.0",
+    "@polkadot/rpc-core": "3.8.0",
+    "@polkadot/types": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "@polkadot/util-crypto": "^5.6.1",
     "@polkadot/x-rxjs": "^5.6.1",
@@ -23,6 +23,6 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.6.1",
-    "@polkadot/rpc-provider": "3.7.4-8"
+    "@polkadot/rpc-provider": "3.8.0"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index de481250b6..563f04f3ff 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
   "sideEffects": [
@@ -16,13 +16,13 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.13",
-    "@polkadot/api-derive": "3.7.4-8",
+    "@polkadot/api-derive": "3.8.0",
     "@polkadot/keyring": "^5.6.1",
-    "@polkadot/metadata": "3.7.4-8",
-    "@polkadot/rpc-core": "3.7.4-8",
-    "@polkadot/rpc-provider": "3.7.4-8",
-    "@polkadot/types": "3.7.4-8",
-    "@polkadot/types-known": "3.7.4-8",
+    "@polkadot/metadata": "3.8.0",
+    "@polkadot/rpc-core": "3.8.0",
+    "@polkadot/rpc-provider": "3.8.0",
+    "@polkadot/types": "3.8.0",
+    "@polkadot/types-known": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "@polkadot/util-crypto": "^5.6.1",
     "@polkadot/x-rxjs": "^5.6.1",
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index ac3d424dc3..4bc133ff67 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/metadata",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
   "sideEffects": [
@@ -16,8 +16,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.13",
-    "@polkadot/types": "3.7.4-8",
-    "@polkadot/types-known": "3.7.4-8",
+    "@polkadot/types": "3.8.0",
+    "@polkadot/types-known": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "@polkadot/util-crypto": "^5.6.1",
     "bn.js": "^4.11.9"
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 7346428c91..f080d7020b 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "sideEffects": false,
@@ -13,9 +13,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.13",
-    "@polkadot/metadata": "3.7.4-8",
-    "@polkadot/rpc-provider": "3.7.4-8",
-    "@polkadot/types": "3.7.4-8",
+    "@polkadot/metadata": "3.8.0",
+    "@polkadot/rpc-provider": "3.8.0",
+    "@polkadot/types": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "@polkadot/x-rxjs": "^5.6.1"
   },
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index f7f9baed83..3abdb8b48d 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "Transport providers for the API",
   "main": "index.js",
   "sideEffects": false,
@@ -13,7 +13,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.13",
-    "@polkadot/types": "3.7.4-8",
+    "@polkadot/types": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "@polkadot/util-crypto": "^5.6.1",
     "@polkadot/x-fetch": "^5.6.1",
@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "@polkadot/keyring": "^5.6.1",
-    "@polkadot/metadata": "3.7.4-8",
+    "@polkadot/metadata": "3.8.0",
     "mock-socket": "^9.0.3",
     "nock": "^13.0.7"
   }
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index 692d23d227..7eb192944a 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/typegen",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "Type generation scripts",
   "main": "index.js",
   "sideEffects": false,
@@ -22,10 +22,10 @@
     "@babel/core": "^7.12.13",
     "@babel/register": "^7.12.13",
     "@babel/runtime": "^7.12.13",
-    "@polkadot/api": "3.7.4-8",
-    "@polkadot/metadata": "3.7.4-8",
-    "@polkadot/rpc-provider": "3.7.4-8",
-    "@polkadot/types": "3.7.4-8",
+    "@polkadot/api": "3.8.0",
+    "@polkadot/metadata": "3.8.0",
+    "@polkadot/rpc-provider": "3.8.0",
+    "@polkadot/types": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "handlebars": "^4.7.6",
     "websocket": "^1.0.33",
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index 4197625234..3f38277127 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-known",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "sideEffects": false,
@@ -14,7 +14,7 @@
   "dependencies": {
     "@babel/runtime": "^7.12.13",
     "@polkadot/networks": "^5.6.1",
-    "@polkadot/types": "3.7.4-8",
+    "@polkadot/types": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "bn.js": "^4.11.9"
   },
diff --git a/packages/types/package.json b/packages/types/package.json
index 6cc3d3f206..66f14b5187 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "3.7.4-8",
+  "version": "3.8.0",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "sideEffects": [
@@ -16,7 +16,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types#readme",
   "dependencies": {
     "@babel/runtime": "^7.12.13",
-    "@polkadot/metadata": "3.7.4-8",
+    "@polkadot/metadata": "3.8.0",
     "@polkadot/util": "^5.6.1",
     "@polkadot/util-crypto": "^5.6.1",
     "@polkadot/x-rxjs": "^5.6.1",
diff --git a/yarn.lock b/yarn.lock
index 0a0e04a42b..5bb808a999 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1743,24 +1743,24 @@ __metadata:
   resolution: "@polkadot/api-contract@workspace:packages/api-contract"
   dependencies:
     "@babel/runtime": ^7.12.13
-    "@polkadot/api": 3.7.4-8
-    "@polkadot/types": 3.7.4-8
+    "@polkadot/api": 3.8.0
+    "@polkadot/types": 3.8.0
     "@polkadot/util": ^5.6.1
     "@polkadot/x-rxjs": ^5.6.1
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/api-derive@3.7.4-8, @polkadot/api-derive@workspace:packages/api-derive":
+"@polkadot/api-derive@3.8.0, @polkadot/api-derive@workspace:packages/api-derive":
   version: 0.0.0-use.local
   resolution: "@polkadot/api-derive@workspace:packages/api-derive"
   dependencies:
     "@babel/runtime": ^7.12.13
-    "@polkadot/api": 3.7.4-8
+    "@polkadot/api": 3.8.0
     "@polkadot/keyring": ^5.6.1
-    "@polkadot/rpc-core": 3.7.4-8
-    "@polkadot/rpc-provider": 3.7.4-8
-    "@polkadot/types": 3.7.4-8
+    "@polkadot/rpc-core": 3.8.0
+    "@polkadot/rpc-provider": 3.8.0
+    "@polkadot/types": 3.8.0
     "@polkadot/util": ^5.6.1
     "@polkadot/util-crypto": ^5.6.1
     "@polkadot/x-rxjs": ^5.6.1
@@ -1768,18 +1768,18 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/api@3.7.4-8, @polkadot/api@workspace:packages/api":
+"@polkadot/api@3.8.0, @polkadot/api@workspace:packages/api":
   version: 0.0.0-use.local
   resolution: "@polkadot/api@workspace:packages/api"
   dependencies:
     "@babel/runtime": ^7.12.13
-    "@polkadot/api-derive": 3.7.4-8
+    "@polkadot/api-derive": 3.8.0
     "@polkadot/keyring": ^5.6.1
-    "@polkadot/metadata": 3.7.4-8
-    "@polkadot/rpc-core": 3.7.4-8
-    "@polkadot/rpc-provider": 3.7.4-8
-    "@polkadot/types": 3.7.4-8
-    "@polkadot/types-known": 3.7.4-8
+    "@polkadot/metadata": 3.8.0
+    "@polkadot/rpc-core": 3.8.0
+    "@polkadot/rpc-provider": 3.8.0
+    "@polkadot/types": 3.8.0
+    "@polkadot/types-known": 3.8.0
     "@polkadot/util": ^5.6.1
     "@polkadot/util-crypto": ^5.6.1
     "@polkadot/x-rxjs": ^5.6.1
@@ -1893,14 +1893,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/metadata@3.7.4-8, @polkadot/metadata@workspace:packages/metadata":
+"@polkadot/metadata@3.8.0, @polkadot/metadata@workspace:packages/metadata":
   version: 0.0.0-use.local
   resolution: "@polkadot/metadata@workspace:packages/metadata"
   dependencies:
     "@babel/runtime": ^7.12.13
     "@polkadot/keyring": ^5.6.1
-    "@polkadot/types": 3.7.4-8
-    "@polkadot/types-known": 3.7.4-8
+    "@polkadot/types": 3.8.0
+    "@polkadot/types-known": 3.8.0
     "@polkadot/util": ^5.6.1
     "@polkadot/util-crypto": ^5.6.1
     bn.js: ^4.11.9
@@ -1916,28 +1916,28 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/rpc-core@3.7.4-8, @polkadot/rpc-core@workspace:packages/rpc-core":
+"@polkadot/rpc-core@3.8.0, @polkadot/rpc-core@workspace:packages/rpc-core":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-core@workspace:packages/rpc-core"
   dependencies:
     "@babel/runtime": ^7.12.13
     "@polkadot/keyring": ^5.6.1
-    "@polkadot/metadata": 3.7.4-8
-    "@polkadot/rpc-provider": 3.7.4-8
-    "@polkadot/types": 3.7.4-8
+    "@polkadot/metadata": 3.8.0
+    "@polkadot/rpc-provider": 3.8.0
+    "@polkadot/types": 3.8.0
     "@polkadot/util": ^5.6.1
     "@polkadot/x-rxjs": ^5.6.1
   languageName: unknown
   linkType: soft
 
-"@polkadot/rpc-provider@3.7.4-8, @polkadot/rpc-provider@workspace:packages/rpc-provider":
+"@polkadot/rpc-provider@3.8.0, @polkadot/rpc-provider@workspace:packages/rpc-provider":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-provider@workspace:packages/rpc-provider"
   dependencies:
     "@babel/runtime": ^7.12.13
     "@polkadot/keyring": ^5.6.1
-    "@polkadot/metadata": 3.7.4-8
-    "@polkadot/types": 3.7.4-8
+    "@polkadot/metadata": 3.8.0
+    "@polkadot/types": 3.8.0
     "@polkadot/util": ^5.6.1
     "@polkadot/util-crypto": ^5.6.1
     "@polkadot/x-fetch": ^5.6.1
@@ -1966,10 +1966,10 @@ __metadata:
     "@babel/core": ^7.12.13
     "@babel/register": ^7.12.13
     "@babel/runtime": ^7.12.13
-    "@polkadot/api": 3.7.4-8
-    "@polkadot/metadata": 3.7.4-8
-    "@polkadot/rpc-provider": 3.7.4-8
-    "@polkadot/types": 3.7.4-8
+    "@polkadot/api": 3.8.0
+    "@polkadot/metadata": 3.8.0
+    "@polkadot/rpc-provider": 3.8.0
+    "@polkadot/types": 3.8.0
     "@polkadot/util": ^5.6.1
     "@types/websocket": ^1.0.1
     "@types/yargs": ^16.0.0
@@ -1985,26 +1985,26 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/types-known@3.7.4-8, @polkadot/types-known@workspace:packages/types-known":
+"@polkadot/types-known@3.8.0, @polkadot/types-known@workspace:packages/types-known":
   version: 0.0.0-use.local
   resolution: "@polkadot/types-known@workspace:packages/types-known"
   dependencies:
     "@babel/runtime": ^7.12.13
     "@polkadot/networks": ^5.6.1
-    "@polkadot/types": 3.7.4-8
+    "@polkadot/types": 3.8.0
     "@polkadot/util": ^5.6.1
     "@types/bn.js": ^4.11.6
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/types@3.7.4-8, @polkadot/types@workspace:packages/types":
+"@polkadot/types@3.8.0, @polkadot/types@workspace:packages/types":
   version: 0.0.0-use.local
   resolution: "@polkadot/types@workspace:packages/types"
   dependencies:
     "@babel/runtime": ^7.12.13
     "@polkadot/keyring": ^5.6.1
-    "@polkadot/metadata": 3.7.4-8
+    "@polkadot/metadata": 3.8.0
     "@polkadot/util": ^5.6.1
     "@polkadot/util-crypto": ^5.6.1
     "@polkadot/x-rxjs": ^5.6.1