diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e6ecfec41..e369287623 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,23 @@
 # CHANGELOG
 
-## 2.11.0-x
+## 3.0.1 Dec 13, 2020
+
+**Important** While this package contains no external interface changes, it doe now compile and ship both cjs and esm modules. This means that modern bundlers will have more information for tree-shaking available. Additionally when using Node with `.mjs` extensions, the esm version imports will be used on recent Node versions. Adding an export map, as here, may have some impacts so a major semver bump is advised. There may be (small) dragons hiding in the dark corners...
+
+Contributed:
+
+- Injection of derives via typesBundle (Thanks to https://github.com/pr0fedt)
+- Added derives for bounties (Thanks to https://github.com/krzysztof-jelski)
 
 Changes:
 
+- Build and expose both cjs and esm via exports map
+- Inject RPC definitions for typesBundle, allowing per-spec configuration
 - Added `query.<section>.<method>.sizeAt(hash, [...params])` for all storage
+- Add new Substrate consumed Weight types
+- Expand `SessionKeys<n>` definitions (up to 9)
+- Cleanup circular `Type` <-> `Text` definitions
+- cleanup circular `Metadata` <-> `TypeRegistry` imports
 
 
 ## 2.10.1 Dec 7, 2020
diff --git a/package.json b/package.json
index db761e4c1d..a488575450 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "packages/*"
   ],
   "resolutions": {
-    "typescript": "^4.1.2"
+    "typescript": "^4.1.3"
   },
   "scripts": {
     "build": "yarn build:interfaces && polkadot-dev-build-ts",
@@ -28,7 +28,7 @@
     "@babel/core": "^7.12.10",
     "@babel/register": "^7.12.10",
     "@babel/runtime": "^7.12.5",
-    "@polkadot/dev": "^0.60.29",
+    "@polkadot/dev": "^0.61.2",
     "@polkadot/ts": "^0.3.58",
     "@polkadot/typegen": "workspace:packages/typegen",
     "@types/jest": "^26.0.19",
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index d899ec52dc..66082c6d73 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -15,7 +15,7 @@
     "@babel/runtime": "^7.12.5",
     "@polkadot/api": "2.10.2-15",
     "@polkadot/types": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
     "@polkadot/x-rxjs": "2.10.2-15",
     "bn.js": "^4.11.9"
   }
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index bc88d7a1eb..3f85786465 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -16,14 +16,14 @@
     "@polkadot/api": "2.10.2-15",
     "@polkadot/rpc-core": "2.10.2-15",
     "@polkadot/types": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
-    "@polkadot/util-crypto": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
+    "@polkadot/util-crypto": "^4.2.2-19",
     "@polkadot/x-rxjs": "2.10.2-15",
     "bn.js": "^4.11.9",
     "memoizee": "^0.4.14"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^4.2.2-16",
+    "@polkadot/keyring": "^4.2.2-19",
     "@polkadot/rpc-provider": "2.10.2-15"
   }
 }
diff --git a/packages/api/package.json b/packages/api/package.json
index 4485854407..5bc81b4e75 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -14,14 +14,14 @@
   "dependencies": {
     "@babel/runtime": "^7.12.5",
     "@polkadot/api-derive": "2.10.2-15",
-    "@polkadot/keyring": "^4.2.2-16",
+    "@polkadot/keyring": "^4.2.2-19",
     "@polkadot/metadata": "2.10.2-15",
     "@polkadot/rpc-core": "2.10.2-15",
     "@polkadot/rpc-provider": "2.10.2-15",
     "@polkadot/types": "2.10.2-15",
     "@polkadot/types-known": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
-    "@polkadot/util-crypto": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
+    "@polkadot/util-crypto": "^4.2.2-19",
     "@polkadot/x-rxjs": "2.10.2-15",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index f0d5f6f09c..fb7f077317 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -15,11 +15,11 @@
     "@babel/runtime": "^7.12.5",
     "@polkadot/types": "2.10.2-15",
     "@polkadot/types-known": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
-    "@polkadot/util-crypto": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
+    "@polkadot/util-crypto": "^4.2.2-19",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^4.2.2-16"
+    "@polkadot/keyring": "^4.2.2-19"
   }
 }
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 0d7cc06778..b4abf174e7 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -16,11 +16,11 @@
     "@polkadot/metadata": "2.10.2-15",
     "@polkadot/rpc-provider": "2.10.2-15",
     "@polkadot/types": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
     "@polkadot/x-rxjs": "2.10.2-15",
     "memoizee": "^0.4.14"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^4.2.2-16"
+    "@polkadot/keyring": "^4.2.2-19"
   }
 }
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 1af61e0168..f6fb7acf0d 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -14,15 +14,15 @@
   "dependencies": {
     "@babel/runtime": "^7.12.5",
     "@polkadot/types": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
-    "@polkadot/util-crypto": "^4.2.2-16",
-    "@polkadot/x-fetch": "^4.2.2-16",
-    "@polkadot/x-ws": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
+    "@polkadot/util-crypto": "^4.2.2-19",
+    "@polkadot/x-fetch": "^4.2.2-19",
+    "@polkadot/x-ws": "^4.2.2-19",
     "bn.js": "^4.11.9",
     "eventemitter3": "^4.0.7"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^4.2.2-16",
+    "@polkadot/keyring": "^4.2.2-19",
     "@polkadot/metadata": "2.10.2-15",
     "mock-socket": "^9.0.3",
     "nock": "^13.0.5"
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index 36a6188268..8f4ccacdc4 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -26,7 +26,7 @@
     "@polkadot/metadata": "2.10.2-15",
     "@polkadot/rpc-provider": "2.10.2-15",
     "@polkadot/types": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
     "handlebars": "^4.7.6",
     "websocket": "^1.0.33",
     "yargs": "^16.2.0"
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index 1e3188dbe5..cbac936182 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -14,7 +14,7 @@
   "dependencies": {
     "@babel/runtime": "^7.12.5",
     "@polkadot/types": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
diff --git a/packages/types/package.json b/packages/types/package.json
index 82396391ee..5a51fc3af3 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -14,15 +14,15 @@
   "dependencies": {
     "@babel/runtime": "^7.12.5",
     "@polkadot/metadata": "2.10.2-15",
-    "@polkadot/util": "^4.2.2-16",
-    "@polkadot/util-crypto": "^4.2.2-16",
+    "@polkadot/util": "^4.2.2-19",
+    "@polkadot/util-crypto": "^4.2.2-19",
     "@polkadot/x-rxjs": "2.10.2-15",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^4.11.9",
     "memoizee": "^0.4.14"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^4.2.2-16",
+    "@polkadot/keyring": "^4.2.2-19",
     "@types/memoizee": "^0.4.5"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 7559478ace..befc77a065 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1693,7 +1693,7 @@ __metadata:
     "@babel/runtime": ^7.12.5
     "@polkadot/api": 2.10.2-15
     "@polkadot/types": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
     "@polkadot/x-rxjs": 2.10.2-15
     bn.js: ^4.11.9
   languageName: unknown
@@ -1705,12 +1705,12 @@ __metadata:
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/api": 2.10.2-15
-    "@polkadot/keyring": ^4.2.2-16
+    "@polkadot/keyring": ^4.2.2-19
     "@polkadot/rpc-core": 2.10.2-15
     "@polkadot/rpc-provider": 2.10.2-15
     "@polkadot/types": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
-    "@polkadot/util-crypto": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
+    "@polkadot/util-crypto": ^4.2.2-19
     "@polkadot/x-rxjs": 2.10.2-15
     bn.js: ^4.11.9
     memoizee: ^0.4.14
@@ -1723,42 +1723,23 @@ __metadata:
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/api-derive": 2.10.2-15
-    "@polkadot/keyring": ^4.2.2-16
+    "@polkadot/keyring": ^4.2.2-19
     "@polkadot/metadata": 2.10.2-15
     "@polkadot/rpc-core": 2.10.2-15
     "@polkadot/rpc-provider": 2.10.2-15
     "@polkadot/types": 2.10.2-15
     "@polkadot/types-known": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
-    "@polkadot/util-crypto": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
+    "@polkadot/util-crypto": ^4.2.2-19
     "@polkadot/x-rxjs": 2.10.2-15
     bn.js: ^4.11.9
     eventemitter3: ^4.0.7
   languageName: unknown
   linkType: soft
 
-"@polkadot/bytes-asmjs-crypto@npm:^2.0.2-16":
-  version: 2.0.2-16
-  resolution: "@polkadot/bytes-asmjs-crypto@npm:2.0.2-16"
-  dependencies:
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-  checksum: 3fbf3d51b700765503be3bff6d022c9b20a15f5104a369c2fdf38f23eb7984401bdb411b37cf6edcb96cb2d8be47331c7eef6a2396c92bba745b951c3f90a66a
-  languageName: node
-  linkType: hard
-
-"@polkadot/bytes-wasm-crypto@npm:^2.0.2-16":
-  version: 2.0.2-16
-  resolution: "@polkadot/bytes-wasm-crypto@npm:2.0.2-16"
-  dependencies:
-    "@babel/runtime": ^7.12.5
-    fflate: ^0.4.2
-  checksum: 173128601bcc9ab2f7e6c106a7c2fee83178e51daa53c403b6c4e4deec91f5a56a2876e8a7867fd4cab1a8e4dc97d17e8edce1de0ecc1ea38d522db3347e0673
-  languageName: node
-  linkType: hard
-
-"@polkadot/dev@npm:^0.60.29":
-  version: 0.60.29
-  resolution: "@polkadot/dev@npm:0.60.29"
+"@polkadot/dev@npm:^0.61.2":
+  version: 0.61.2
+  resolution: "@polkadot/dev@npm:0.61.2"
   dependencies:
     "@babel/cli": ^7.12.10
     "@babel/core": ^7.12.10
@@ -1821,7 +1802,7 @@ __metadata:
     typedoc: ^0.19.2
     typedoc-plugin-markdown: ^3.1.1
     typedoc-plugin-no-inherit: ^1.2.0
-    typescript: ^4.1.2
+    typescript: ^4.1.3
     yargs: ^16.2.0
   bin:
     polkadot-ci-ghact-build: scripts/polkadot-ci-ghact-build.cjs
@@ -1840,27 +1821,26 @@ __metadata:
     polkadot-exec-eslint: scripts/polkadot-exec-eslint.cjs
     polkadot-exec-ghpages: scripts/polkadot-exec-ghpages.cjs
     polkadot-exec-ghrelease: scripts/polkadot-exec-ghrelease.cjs
-    polkadot-exec-lerna: scripts/polkadot-exec-lerna.cjs
     polkadot-exec-prettier: scripts/polkadot-exec-prettier.cjs
     polkadot-exec-tsc: scripts/polkadot-exec-tsc.cjs
     polkadot-exec-typedoc: scripts/polkadot-exec-typedoc.cjs
     polkadot-exec-vuepress: scripts/polkadot-exec-vuepress.cjs
     polkadot-exec-webpack: scripts/polkadot-exec-webpack.cjs
-  checksum: e2ff24a9b0d4ac815030e1b5d74f1556f35135f14963dd5c0718c552904548f5fef4185d20fa8441dd66576a4fe07600b69194c4c71364b5988fe08babfaf9ad
+  checksum: aada176bd714442e309941c42f0cf48466599aa1e0cbca894e00c91b6efd2eb6b11a677f1e607d46f3245a780934d5f0b4b4029ee2124e8d41cb5f6c96423b21
   languageName: node
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-"@polkadot/keyring@npm:^4.2.2-16":
-  version: 4.2.2-16
-  resolution: "@polkadot/keyring@npm:4.2.2-16"
+"@polkadot/keyring@npm:^4.2.2-19":
+  version: 4.2.2-19
+  resolution: "@polkadot/keyring@npm:4.2.2-19"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/util": 4.2.2-16
-    "@polkadot/util-crypto": 4.2.2-16
+    "@polkadot/util": 4.2.2-19
+    "@polkadot/util-crypto": 4.2.2-19
   peerDependencies:
-    "@polkadot/util": 4.2.2-16
-    "@polkadot/util-crypto": 4.2.2-16
-  checksum: e0b64fd28db24c7875c1047f1b975267de666c8f8d1e6661454809fb5201821eb6c5b865cdaf48a3603e54b6c064b5aac34a6e78eefe5ff395381dc3f05cd902
+    "@polkadot/util": 4.2.2-19
+    "@polkadot/util-crypto": 4.2.2-19
+  checksum: 4eb08c31760d67ab5a6bda6586514a02497c777d6470fcdb147da866d04791ee4303fb66dc0cb7ced88e907eb184894a3344affc2768962c763cf76ea4cd58fb
   languageName: node
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@@ -1869,21 +1849,21 @@ __metadata:
   resolution: "@polkadot/metadata@workspace:packages/metadata"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/keyring": ^4.2.2-16
+    "@polkadot/keyring": ^4.2.2-19
     "@polkadot/types": 2.10.2-15
     "@polkadot/types-known": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
-    "@polkadot/util-crypto": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
+    "@polkadot/util-crypto": ^4.2.2-19
     bn.js: ^4.11.9
   languageName: unknown
   linkType: soft
 
-"@polkadot/networks@npm:4.2.2-16":
-  version: 4.2.2-16
-  resolution: "@polkadot/networks@npm:4.2.2-16"
+"@polkadot/networks@npm:4.2.2-19":
+  version: 4.2.2-19
+  resolution: "@polkadot/networks@npm:4.2.2-19"
   dependencies:
     "@babel/runtime": ^7.12.5
-  checksum: 86432ef66188ddffbf0a10418f0e3aec9a49b6e234e6b08d3af3825fbb1371aa5f5bea8ecb1639e541dca13d9574628d0e79c117e0821a0665bf8abc9f9f23e4
+  checksum: b38578260c9fdc19c8f0fe1471b0b692afa1a20b0985856187515f59830760bf3ea3332033da0696a1aab6bfa037d8937eb205f9492d5eec6d9a7f4fa10893c8
   languageName: node
   linkType: hard
 
@@ -1892,11 +1872,11 @@ __metadata:
   resolution: "@polkadot/rpc-core@workspace:packages/rpc-core"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/keyring": ^4.2.2-16
+    "@polkadot/keyring": ^4.2.2-19
     "@polkadot/metadata": 2.10.2-15
     "@polkadot/rpc-provider": 2.10.2-15
     "@polkadot/types": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
     "@polkadot/x-rxjs": 2.10.2-15
     memoizee: ^0.4.14
   languageName: unknown
@@ -1907,13 +1887,13 @@ __metadata:
   resolution: "@polkadot/rpc-provider@workspace:packages/rpc-provider"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/keyring": ^4.2.2-16
+    "@polkadot/keyring": ^4.2.2-19
     "@polkadot/metadata": 2.10.2-15
     "@polkadot/types": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
-    "@polkadot/util-crypto": ^4.2.2-16
-    "@polkadot/x-fetch": ^4.2.2-16
-    "@polkadot/x-ws": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
+    "@polkadot/util-crypto": ^4.2.2-19
+    "@polkadot/x-fetch": ^4.2.2-19
+    "@polkadot/x-ws": ^4.2.2-19
     bn.js: ^4.11.9
     eventemitter3: ^4.0.7
     mock-socket: ^9.0.3
@@ -1941,7 +1921,7 @@ __metadata:
     "@polkadot/metadata": 2.10.2-15
     "@polkadot/rpc-provider": 2.10.2-15
     "@polkadot/types": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
     "@types/websocket": ^1.0.1
     "@types/yargs": ^15.0.11
     handlebars: ^4.7.6
@@ -1962,7 +1942,7 @@ __metadata:
   dependencies:
     "@babel/runtime": ^7.12.5
     "@polkadot/types": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
     "@types/bn.js": ^4.11.6
     bn.js: ^4.11.9
   languageName: unknown
@@ -1973,10 +1953,10 @@ __metadata:
   resolution: "@polkadot/types@workspace:packages/types"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/keyring": ^4.2.2-16
+    "@polkadot/keyring": ^4.2.2-19
     "@polkadot/metadata": 2.10.2-15
-    "@polkadot/util": ^4.2.2-16
-    "@polkadot/util-crypto": ^4.2.2-16
+    "@polkadot/util": ^4.2.2-19
+    "@polkadot/util-crypto": ^4.2.2-19
     "@polkadot/x-rxjs": 2.10.2-15
     "@types/bn.js": ^4.11.6
     "@types/memoizee": ^0.4.5
@@ -1985,15 +1965,15 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/util-crypto@npm:4.2.2-16, @polkadot/util-crypto@npm:^4.2.2-16":
-  version: 4.2.2-16
-  resolution: "@polkadot/util-crypto@npm:4.2.2-16"
+"@polkadot/util-crypto@npm:4.2.2-19, @polkadot/util-crypto@npm:^4.2.2-19":
+  version: 4.2.2-19
+  resolution: "@polkadot/util-crypto@npm:4.2.2-19"
   dependencies:
     "@babel/runtime": ^7.12.5
-    "@polkadot/networks": 4.2.2-16
-    "@polkadot/util": 4.2.2-16
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