diff --git a/.github/workflows/.env b/.github/workflows/.env
index 31ea4848..cf7f1036 100644
--- a/.github/workflows/.env
+++ b/.github/workflows/.env
@@ -1,5 +1,5 @@
 #DRIVE_BRANCH=v0.21-dev
 #DAPI_BRANCH=v0.21-dev
-#DASHMATE_BRANCH=update-dependencies
+DASHMATE_BRANCH=v0.21-dev
 TEST_SUITE_BRANCH=update-dependencies
 #LOG_LEVEL=silly
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fae264c5..0e32d701 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,19 @@
+# [3.21.0](https://github.com/dashevo/DashJS/compare/v3.20.3...v3.21.0) (2021-10-21)
+
+
+### Features
+
+* **Document:** throw error on null Data Сontract ([#244](https://github.com/dashevo/DashJS/issues/244))
+* support higher protocol version ([#271](https://github.com/dashevo/DashJS/issues/271))
+* add `driveProtocolVersion` option ([#249](https://github.com/dashevo/DashJS/issues/249))
+* convenient broadcast errors ([#262](https://github.com/dashevo/DashJS/issues/262), [#266](https://github.com/dashevo/DashJS/issues/266), [#273](https://github.com/dashevo/DashJS/issues/273))
+
+### BREAKING CHANGE
+
+`StateTransitionBroadcastError#getData` is removed. Use `StateTransitionBroadcastError#getCause` to get additional details.
+
+
+
 ## [3.20.3](https://github.com/dashevo/DashJS/compare/v3.20.2...v3.20.3) (2021-08-08)
 
 ### Chores
diff --git a/package-lock.json b/package-lock.json
index 153f9d81..ac27a74d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "dash",
-  "version": "3.21.0-dev.15",
+  "version": "3.21.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "dash",
-      "version": "3.21.0-dev.15",
+      "version": "3.21.0",
       "license": "MIT",
       "dependencies": {
         "@dashevo/dapi-client": "~0.21.2",
@@ -232,9 +232,9 @@
       }
     },
     "node_modules/@dashevo/dashcore-lib/node_modules/@types/node": {
-      "version": "12.20.29",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.20.29.tgz",
-      "integrity": "sha512-dU2ypz+gO5va1OBvs0iT3BNHG5SgTqRvq8r+kU3e/LAseKapUJ8zTUE9Ve9fTpi27tN/7ahOAhCJwQWsffvsyw=="
+      "version": "12.20.34",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.20.34.tgz",
+      "integrity": "sha512-+G6kIkmDOyWs7Co8M48lgyauuOlgZeRib64/DFBwYlY6ngwT7wgcF7ga1DsmZImUDfm2rE1jMnUhIEC/gdJ5rw=="
     },
     "node_modules/@dashevo/dpp": {
       "version": "0.21.0",
@@ -612,9 +612,9 @@
       "dev": true
     },
     "node_modules/@types/node": {
-      "version": "14.17.22",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.17.22.tgz",
-      "integrity": "sha512-6Mgu9YWd8j0dk9M8V9+5w6ktqIFCcn/fFXAVIDFk/niAOFiOiz4GeFAMWYAQjKrcsASbFqMkqR8/Y2wuVCAkNg=="
+      "version": "14.17.29",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.17.29.tgz",
+      "integrity": "sha512-sd4CHI9eTJXTH2vF3RGtGkqvWRwhsSSUFsXD4oG38GZzSZ0tNPbWikd2AbOAcKxCXhOg57fL8FPxjpfSzb2pIQ=="
     },
     "node_modules/@types/sinon": {
       "version": "9.0.11",
@@ -1725,24 +1725,24 @@
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     },
     "node_modules/chokidar": {
-      "version": "3.5.2",
-      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.2.tgz",
-      "integrity": "sha512-ekGhOnNVPgT77r4K/U3GDhu+FQ2S8TnK/s2KbIGXi0SZWuwkZ2QNyfWdZW+TVfn84DpEP7rLeCt2UI6bJ8GwbQ==",
+      "version": "3.5.1",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.1.tgz",
+      "integrity": "sha512-9+s+Od+W0VJJzawDma/gvBNQqkTiqYTWLuZoyAsivsI4AaWTCzHG06/TMjsf1cYe9Cb97UCEhjz7HvnPk2p/tw==",
       "dev": true,
       "dependencies": {
-        "anymatch": "~3.1.2",
+        "anymatch": "~3.1.1",
         "braces": "~3.0.2",
-        "glob-parent": "~5.1.2",
+        "glob-parent": "~5.1.0",
         "is-binary-path": "~2.1.0",
         "is-glob": "~4.0.1",
         "normalize-path": "~3.0.0",
-        "readdirp": "~3.6.0"
+        "readdirp": "~3.5.0"
       },
       "engines": {
         "node": ">= 8.10.0"
       },
       "optionalDependencies": {
-        "fsevents": "~2.3.2"
+        "fsevents": "~2.3.1"
       }
     },
     "node_modules/chokidar/node_modules/glob-parent": {
@@ -2105,15 +2105,6 @@
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@@ -3690,15 +3672,6 @@
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@@ -3787,15 +3760,6 @@
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@@ -3929,9 +3884,9 @@
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-      "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
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-        "inherits": "2",
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-        "once": "^1.3.0",
-        "path-is-absolute": "^1.0.0"
-      },
-      "engines": {
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-      "funding": {
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+        "safe-buffer": "~5.1.0"
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+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
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@@ -18299,16 +17964,6 @@
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-          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
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@@ -19056,14 +18693,6 @@
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diff --git a/package.json b/package.json
index ef308bef..77186c97 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dash",
-  "version": "3.21.0-dev.15",
+  "version": "3.21.0",
   "description": "Dash library for JavaScript/TypeScript ecosystem (Wallet, DAPI, Primitives, BLS, ...)",
   "main": "build/src/index.js",
   "unpkg": "dist/dash.min.js",