diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1555848416..9c7344ccc3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,11 +1,13 @@
 # CHANGELOG
 
-## 1.21.0-beta.x
+## 1.21.1 Jun 23, 2020
 
+- Fix subscriptions never unsubscribing after the id swap in 1.18.1 (Thanks to https://github.com/dillu24 for testing iterations)
 - Add support for `CheckMortality` signed extension (old `CheckEra` is now an alias)
-- Fix subscriptions never unsubscribing after the id type swap in 1.18.1
 - Promise API will default to using `getStorage` on non-subscription calls, reducing RPC overhead
 - Optimize derive BN allocations, using in-place operators as applicable
+- Add new substrate types for Babe EquivocationProof
+- Adjust `Releases` enum to use a shared instance
 
 ## 1.20.1 Jun 22, 2020
 
diff --git a/lerna.json b/lerna.json
index dacf631f66..5b355facf5 100644
--- a/lerna.json
+++ b/lerna.json
@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "1.21.0-beta.4"
+  "version": "1.21.0"
 }
diff --git a/package.json b/package.json
index 1674bdb613..8dbefdfe52 100644
--- a/package.json
+++ b/package.json
@@ -27,12 +27,12 @@
     "@babel/core": "^7.10.3",
     "@babel/register": "^7.10.3",
     "@babel/runtime": "^7.10.3",
-    "@polkadot/dev": "^0.55.11",
+    "@polkadot/dev": "^0.55.12",
     "@polkadot/ts": "^0.3.26",
     "@polkadot/typegen": "workspace:packages/typegen",
     "@types/jest": "^26.0.0",
     "@vuepress/plugin-search": "^1.5.2",
     "copyfiles": "^2.3.0"
   },
-  "version": "1.21.0-beta.4"
+  "version": "1.21.0"
 }
diff --git a/packages/api-contract/package.json b/packages/api-contract/package.json
index e924cfd91b..cdfd8bdef8 100644
--- a/packages/api-contract/package.json
+++ b/packages/api-contract/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-contract",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "Interfaces for interacting with contracts and contract ABIs",
   "main": "index.js",
   "keywords": [
@@ -27,9 +27,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-contract#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/api": "1.21.0-beta.4",
-    "@polkadot/rpc-core": "1.21.0-beta.4",
-    "@polkadot/types": "1.21.0-beta.4",
+    "@polkadot/api": "1.21.0",
+    "@polkadot/rpc-core": "1.21.0",
+    "@polkadot/types": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "bn.js": "^5.1.2",
     "rxjs": "^6.5.5"
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index 001cf67290..822404b346 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
   "keywords": [
@@ -28,10 +28,10 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/api": "1.21.0-beta.4",
-    "@polkadot/rpc-core": "1.21.0-beta.4",
-    "@polkadot/rpc-provider": "1.21.0-beta.4",
-    "@polkadot/types": "1.21.0-beta.4",
+    "@polkadot/api": "1.21.0",
+    "@polkadot/rpc-core": "1.21.0",
+    "@polkadot/rpc-provider": "1.21.0",
+    "@polkadot/types": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "@polkadot/util-crypto": "^2.15.1",
     "bn.js": "^5.1.2",
diff --git a/packages/api/package.json b/packages/api/package.json
index b08f913b31..6aec90e25a 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
   "keywords": [
@@ -27,13 +27,13 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/api-derive": "1.21.0-beta.4",
+    "@polkadot/api-derive": "1.21.0",
     "@polkadot/keyring": "^2.15.1",
-    "@polkadot/metadata": "1.21.0-beta.4",
-    "@polkadot/rpc-core": "1.21.0-beta.4",
-    "@polkadot/rpc-provider": "1.21.0-beta.4",
-    "@polkadot/types": "1.21.0-beta.4",
-    "@polkadot/types-known": "1.21.0-beta.4",
+    "@polkadot/metadata": "1.21.0",
+    "@polkadot/rpc-core": "1.21.0",
+    "@polkadot/rpc-provider": "1.21.0",
+    "@polkadot/types": "1.21.0",
+    "@polkadot/types-known": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "@polkadot/util-crypto": "^2.15.1",
     "bn.js": "^5.1.2",
diff --git a/packages/metadata/package.json b/packages/metadata/package.json
index e8a6e3cd51..e38ca3961b 100644
--- a/packages/metadata/package.json
+++ b/packages/metadata/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/metadata",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "Helpers to extract information from runtime metadata",
   "main": "index.js",
   "publishConfig": {
@@ -27,8 +27,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/types": "1.21.0-beta.4",
-    "@polkadot/types-known": "1.21.0-beta.4",
+    "@polkadot/types": "1.21.0",
+    "@polkadot/types-known": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "@polkadot/util-crypto": "^2.15.1",
     "bn.js": "^5.1.2"
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 55be533879..5e48f055ef 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "keywords": [
@@ -27,9 +27,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/metadata": "1.21.0-beta.4",
-    "@polkadot/rpc-provider": "1.21.0-beta.4",
-    "@polkadot/types": "1.21.0-beta.4",
+    "@polkadot/metadata": "1.21.0",
+    "@polkadot/rpc-provider": "1.21.0",
+    "@polkadot/types": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "memoizee": "^0.4.14",
     "rxjs": "^6.5.5"
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index d529492312..e91c150aff 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "Transport providers for the API",
   "main": "index.js",
   "keywords": [
@@ -27,8 +27,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-provider#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/metadata": "1.21.0-beta.4",
-    "@polkadot/types": "1.21.0-beta.4",
+    "@polkadot/metadata": "1.21.0",
+    "@polkadot/types": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "@polkadot/util-crypto": "^2.15.1",
     "bn.js": "^5.1.2",
diff --git a/packages/typegen/package.json b/packages/typegen/package.json
index 1f78c255c3..267bc78d0d 100644
--- a/packages/typegen/package.json
+++ b/packages/typegen/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/typegen",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "Type generation scripts",
   "main": "index.js",
   "bin": {
@@ -36,10 +36,10 @@
     "@babel/core": "^7.10.3",
     "@babel/register": "^7.10.3",
     "@babel/runtime": "^7.10.3",
-    "@polkadot/api": "1.21.0-beta.4",
-    "@polkadot/metadata": "1.21.0-beta.4",
-    "@polkadot/rpc-provider": "1.21.0-beta.4",
-    "@polkadot/types": "1.21.0-beta.4",
+    "@polkadot/api": "1.21.0",
+    "@polkadot/metadata": "1.21.0",
+    "@polkadot/rpc-provider": "1.21.0",
+    "@polkadot/types": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "handlebars": "^4.7.6",
     "websocket": "^1.0.31",
diff --git a/packages/types-known/package.json b/packages/types-known/package.json
index 4d7ccebd80..66b359a535 100644
--- a/packages/types-known/package.json
+++ b/packages/types-known/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types-known",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "keywords": [
@@ -27,7 +27,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types-known#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/types": "1.21.0-beta.4",
+    "@polkadot/types": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "bn.js": "^5.1.2"
   },
diff --git a/packages/types/package.json b/packages/types/package.json
index a4a0db7676..3ca14aeb6e 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "1.21.0-beta.4",
+  "version": "1.21.0",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "keywords": [
@@ -27,7 +27,7 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/types#readme",
   "dependencies": {
     "@babel/runtime": "^7.10.3",
-    "@polkadot/metadata": "1.21.0-beta.4",
+    "@polkadot/metadata": "1.21.0",
     "@polkadot/util": "^2.15.1",
     "@polkadot/util-crypto": "^2.15.1",
     "@types/bn.js": "^4.11.6",
diff --git a/yarn.lock b/yarn.lock
index f69c0ca79f..6a9b1d7de6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2669,25 +2669,25 @@ __metadata:
   resolution: "@polkadot/api-contract@workspace:packages/api-contract"
   dependencies:
     "@babel/runtime": ^7.10.3
-    "@polkadot/api": 1.21.0-beta.4
-    "@polkadot/rpc-core": 1.21.0-beta.4
-    "@polkadot/types": 1.21.0-beta.4
+    "@polkadot/api": 1.21.0
+    "@polkadot/rpc-core": 1.21.0
+    "@polkadot/types": 1.21.0
     "@polkadot/util": ^2.15.1
     bn.js: ^5.1.2
     rxjs: ^6.5.5
   languageName: unknown
   linkType: soft
 
-"@polkadot/api-derive@1.21.0-beta.4, @polkadot/api-derive@workspace:packages/api-derive":
+"@polkadot/api-derive@1.21.0, @polkadot/api-derive@workspace:packages/api-derive":
   version: 0.0.0-use.local
   resolution: "@polkadot/api-derive@workspace:packages/api-derive"
   dependencies:
     "@babel/runtime": ^7.10.3
-    "@polkadot/api": 1.21.0-beta.4
+    "@polkadot/api": 1.21.0
     "@polkadot/keyring": ^2.15.1
-    "@polkadot/rpc-core": 1.21.0-beta.4
-    "@polkadot/rpc-provider": 1.21.0-beta.4
-    "@polkadot/types": 1.21.0-beta.4
+    "@polkadot/rpc-core": 1.21.0
+    "@polkadot/rpc-provider": 1.21.0
+    "@polkadot/types": 1.21.0
     "@polkadot/util": ^2.15.1
     "@polkadot/util-crypto": ^2.15.1
     bn.js: ^5.1.2
@@ -2696,18 +2696,18 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/api@1.21.0-beta.4, @polkadot/api@workspace:packages/api":
+"@polkadot/api@1.21.0, @polkadot/api@workspace:packages/api":
   version: 0.0.0-use.local
   resolution: "@polkadot/api@workspace:packages/api"
   dependencies:
     "@babel/runtime": ^7.10.3
-    "@polkadot/api-derive": 1.21.0-beta.4
+    "@polkadot/api-derive": 1.21.0
     "@polkadot/keyring": ^2.15.1
-    "@polkadot/metadata": 1.21.0-beta.4
-    "@polkadot/rpc-core": 1.21.0-beta.4
-    "@polkadot/rpc-provider": 1.21.0-beta.4
-    "@polkadot/types": 1.21.0-beta.4
-    "@polkadot/types-known": 1.21.0-beta.4
+    "@polkadot/metadata": 1.21.0
+    "@polkadot/rpc-core": 1.21.0
+    "@polkadot/rpc-provider": 1.21.0
+    "@polkadot/types": 1.21.0
+    "@polkadot/types-known": 1.21.0
     "@polkadot/util": ^2.15.1
     "@polkadot/util-crypto": ^2.15.1
     bn.js: ^5.1.2
@@ -2716,9 +2716,9 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/dev@npm:^0.55.11":
-  version: 0.55.11
-  resolution: "@polkadot/dev@npm:0.55.11"
+"@polkadot/dev@npm:^0.55.12":
+  version: 0.55.12
+  resolution: "@polkadot/dev@npm:0.55.12"
   dependencies:
     "@babel/cli": ^7.10.3
     "@babel/core": ^7.10.3
@@ -2740,8 +2740,8 @@ __metadata:
     "@babel/preset-typescript": ^7.10.1
     "@babel/register": ^7.10.3
     "@babel/runtime": ^7.10.3
-    "@typescript-eslint/eslint-plugin": 3.3.0
-    "@typescript-eslint/parser": 3.3.0
+    "@typescript-eslint/eslint-plugin": 3.4.0
+    "@typescript-eslint/parser": 3.4.0
     "@vue/component-compiler-utils": ^3.1.2
     babel-core: ^7.0.0-bridge.0
     babel-jest: ^26.0.1
@@ -2750,7 +2750,7 @@ __metadata:
     browserslist: ^4.12.0
     coveralls: ^3.1.0
     cpx: ^1.5.0
-    eslint: ^7.3.0
+    eslint: ^7.3.1
     eslint-config-standard: ^14.1.1
     eslint-import-resolver-node: ^0.3.4
     eslint-plugin-header: ^3.0.0
@@ -2801,7 +2801,7 @@ __metadata:
     polkadot-exec-typedoc: scripts/polkadot-exec-typedoc.js
     polkadot-exec-vuepress: scripts/polkadot-exec-vuepress.js
     polkadot-exec-webpack: scripts/polkadot-exec-webpack.js
-  checksum: 3/8e0779a09438961c5a5e5a6395f503620eccf130e4d43e99c9c41a1a0794b190804b2b52302ef7ae3df74f2947489c7ab75ea150bd60f59a1ab8f9fbfa314cdb
+  checksum: 3/095ccaabe03dfe81402ccfa4cb0751bd29c932031eb3a7923b1a62eb6f9bf8bf1194b93f8b89b2995ba7c6bae1845582e0b1f9c8ac34b54467f54bcc0f422fa9
   languageName: node
   linkType: hard
 
@@ -2816,43 +2816,43 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/metadata@1.21.0-beta.4, @polkadot/metadata@workspace:packages/metadata":
+"@polkadot/metadata@1.21.0, @polkadot/metadata@workspace:packages/metadata":
   version: 0.0.0-use.local
   resolution: "@polkadot/metadata@workspace:packages/metadata"
   dependencies:
     "@babel/runtime": ^7.10.3
     "@polkadot/keyring": ^2.15.1
-    "@polkadot/types": 1.21.0-beta.4
-    "@polkadot/types-known": 1.21.0-beta.4
+    "@polkadot/types": 1.21.0
+    "@polkadot/types-known": 1.21.0
     "@polkadot/util": ^2.15.1
     "@polkadot/util-crypto": ^2.15.1
     bn.js: ^5.1.2
   languageName: unknown
   linkType: soft
 
-"@polkadot/rpc-core@1.21.0-beta.4, @polkadot/rpc-core@workspace:packages/rpc-core":
+"@polkadot/rpc-core@1.21.0, @polkadot/rpc-core@workspace:packages/rpc-core":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-core@workspace:packages/rpc-core"
   dependencies:
     "@babel/runtime": ^7.10.3
     "@polkadot/keyring": ^2.15.1
-    "@polkadot/metadata": 1.21.0-beta.4
-    "@polkadot/rpc-provider": 1.21.0-beta.4
-    "@polkadot/types": 1.21.0-beta.4
+    "@polkadot/metadata": 1.21.0
+    "@polkadot/rpc-provider": 1.21.0
+    "@polkadot/types": 1.21.0
     "@polkadot/util": ^2.15.1
     memoizee: ^0.4.14
     rxjs: ^6.5.5
   languageName: unknown
   linkType: soft
 
-"@polkadot/rpc-provider@1.21.0-beta.4, @polkadot/rpc-provider@workspace:packages/rpc-provider":
+"@polkadot/rpc-provider@1.21.0, @polkadot/rpc-provider@workspace:packages/rpc-provider":
   version: 0.0.0-use.local
   resolution: "@polkadot/rpc-provider@workspace:packages/rpc-provider"
   dependencies:
     "@babel/runtime": ^7.10.3
     "@polkadot/keyring": ^2.15.1
-    "@polkadot/metadata": 1.21.0-beta.4
-    "@polkadot/types": 1.21.0-beta.4
+    "@polkadot/metadata": 1.21.0
+    "@polkadot/types": 1.21.0
     "@polkadot/util": ^2.15.1
     "@polkadot/util-crypto": ^2.15.1
     bn.js: ^5.1.2
@@ -2880,10 +2880,10 @@ __metadata:
     "@babel/core": ^7.10.3
     "@babel/register": ^7.10.3
     "@babel/runtime": ^7.10.3
-    "@polkadot/api": 1.21.0-beta.4
-    "@polkadot/metadata": 1.21.0-beta.4
-    "@polkadot/rpc-provider": 1.21.0-beta.4
-    "@polkadot/types": 1.21.0-beta.4
+    "@polkadot/api": 1.21.0
+    "@polkadot/metadata": 1.21.0
+    "@polkadot/rpc-provider": 1.21.0
+    "@polkadot/types": 1.21.0
     "@polkadot/util": ^2.15.1
     "@types/websocket": ^1.0.0
     "@types/yargs": ^15.0.5
@@ -2899,25 +2899,25 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polkadot/types-known@1.21.0-beta.4, @polkadot/types-known@workspace:packages/types-known":
+"@polkadot/types-known@1.21.0, @polkadot/types-known@workspace:packages/types-known":
   version: 0.0.0-use.local
   resolution: "@polkadot/types-known@workspace:packages/types-known"
   dependencies:
     "@babel/runtime": ^7.10.3
-    "@polkadot/types": 1.21.0-beta.4
+    "@polkadot/types": 1.21.0
     "@polkadot/util": ^2.15.1
     "@types/bn.js": ^4.11.6
     bn.js: ^5.1.2
   languageName: unknown
   linkType: soft
 
-"@polkadot/types@1.21.0-beta.4, @polkadot/types@workspace:packages/types":
+"@polkadot/types@1.21.0, @polkadot/types@workspace:packages/types":
   version: 0.0.0-use.local
   resolution: "@polkadot/types@workspace:packages/types"
   dependencies:
     "@babel/runtime": ^7.10.3
     "@polkadot/keyring": ^2.15.1
-    "@polkadot/metadata": 1.21.0-beta.4
+    "@polkadot/metadata": 1.21.0
     "@polkadot/util": ^2.15.1
     "@polkadot/util-crypto": ^2.15.1
     "@types/bn.js": ^4.11.6
@@ -3278,11 +3278,12 @@ __metadata:
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+  resolution: "@typescript-eslint/typescript-estree@npm:3.4.0"
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-  resolution: "escodegen@npm:1.14.2"
+  version: 1.14.3
+  resolution: "escodegen@npm:1.14.3"
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-  resolution: "eslint@npm:7.3.0"
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+  resolution: "eslint@npm:7.3.1"
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-    "@polkadot/dev": ^0.55.11
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-  resolution: "vue-loader@npm:15.9.2"
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+  resolution: "vue-loader@npm:15.9.3"
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