diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index cd45c1c86ae..fce3dcc81f6 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,5 +1,5 @@
 {
-  ".": "0.19.0",
-  "barretenberg": "0.19.0",
-  "barretenberg/ts": "0.19.0"
+  ".": "0.20.0",
+  "barretenberg": "0.20.0",
+  "barretenberg/ts": "0.20.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8f7898f35b..2e52ef8b6ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,57 @@
 # Changelog
 
+## [0.20.0](https://github.com/AztecProtocol/aztec-packages/compare/aztec-packages-v0.19.0...aztec-packages-v0.20.0) (2024-01-19)
+
+
+### ⚠ BREAKING CHANGES
+
+* Unify ABIs between nargo and yarn-project ([#3989](https://github.com/AztecProtocol/aztec-packages/issues/3989))
+
+### Features
+
+* **avm:** Add internal jump and return, adjust control flow ([#4140](https://github.com/AztecProtocol/aztec-packages/issues/4140)) ([b77afb1](https://github.com/AztecProtocol/aztec-packages/commit/b77afb14c609cfc04663a318eecaa8cbd3b2fa85))
+* **avm:** Better field arithmetic ([#4142](https://github.com/AztecProtocol/aztec-packages/issues/4142)) ([7308e31](https://github.com/AztecProtocol/aztec-packages/commit/7308e31c981ec7c03d0474811b2979e6f418f348))
+* **avm:** Encode TS AVM instructions as bytecode, especially for testing ([#4115](https://github.com/AztecProtocol/aztec-packages/issues/4115)) ([de6e2ed](https://github.com/AztecProtocol/aztec-packages/commit/de6e2edc09b823542f45e14b45c32ec10894f6c7))
+* **public-vm:** Avm journal ([#3945](https://github.com/AztecProtocol/aztec-packages/issues/3945)) ([5658468](https://github.com/AztecProtocol/aztec-packages/commit/56584683340cd29b26adbcc60d3cd58fe889e8ad))
+* Publish block body separately ([#4118](https://github.com/AztecProtocol/aztec-packages/issues/4118)) ([a04e1e3](https://github.com/AztecProtocol/aztec-packages/commit/a04e1e351fe0b42dfa6ef7d1894dffbcff19b187)), closes [#3944](https://github.com/AztecProtocol/aztec-packages/issues/3944)
+* Unify ABIs between nargo and yarn-project ([#3989](https://github.com/AztecProtocol/aztec-packages/issues/3989)) ([d083438](https://github.com/AztecProtocol/aztec-packages/commit/d0834380a749a48d31e3075f831f3279f18fc01e))
+* Update noir ([#4082](https://github.com/AztecProtocol/aztec-packages/issues/4082)) ([0e6037a](https://github.com/AztecProtocol/aztec-packages/commit/0e6037ad48fc1eb8ab3524d64755f4f27f64bf36))
+* Updating L2 Block encoding and `Rollup.process` function ([#4015](https://github.com/AztecProtocol/aztec-packages/issues/4015)) ([2d8eb37](https://github.com/AztecProtocol/aztec-packages/commit/2d8eb37edbc9164639fe6d20140364288e2b72a9)), closes [#3936](https://github.com/AztecProtocol/aztec-packages/issues/3936) [#4010](https://github.com/AztecProtocol/aztec-packages/issues/4010) [#4011](https://github.com/AztecProtocol/aztec-packages/issues/4011)
+
+
+### Bug Fixes
+
+* Bb.js version in yarn lockfile ([7b96760](https://github.com/AztecProtocol/aztec-packages/commit/7b96760f7d201d984bab885b996b218bd427be22))
+* **build:** Publish bb.js from CCI ([#4151](https://github.com/AztecProtocol/aztec-packages/issues/4151)) ([09dbfcd](https://github.com/AztecProtocol/aztec-packages/commit/09dbfcd7e8d3b15cf79686eea44a4032f2aa4bbb))
+* Misleading error message in `PublicState::read` ([#4149](https://github.com/AztecProtocol/aztec-packages/issues/4149)) ([fa4d919](https://github.com/AztecProtocol/aztec-packages/commit/fa4d919d25b5253d1f39b7f2db183771f461fe1b))
+* Nargo destination path in bootstrap cache ([#4103](https://github.com/AztecProtocol/aztec-packages/issues/4103)) ([4901309](https://github.com/AztecProtocol/aztec-packages/commit/490130979a5d3a3e703c7e28417835aa86fa8cd7))
+* Reinstate Ultra arith rec verifier test ([#3886](https://github.com/AztecProtocol/aztec-packages/issues/3886)) ([995973b](https://github.com/AztecProtocol/aztec-packages/commit/995973b0226ddd7ae4cb5c3501859bec10f4eb93))
+* Upload_benchmarks_to_s3.sh missing exit ([#4046](https://github.com/AztecProtocol/aztec-packages/issues/4046)) ([52a9327](https://github.com/AztecProtocol/aztec-packages/commit/52a93279e43ae6780e8bfc253ee0570a443ed472))
+
+
+### Miscellaneous
+
+* Archiver store ([#3966](https://github.com/AztecProtocol/aztec-packages/issues/3966)) ([af2be87](https://github.com/AztecProtocol/aztec-packages/commit/af2be878b49aceb668480e5a291aed7dea5319ba))
+* **avm:** List avm opcodes in a (enum => class) map in TS ([#4113](https://github.com/AztecProtocol/aztec-packages/issues/4113)) ([dee564a](https://github.com/AztecProtocol/aztec-packages/commit/dee564a16293ff8f0aa2c6ba9fb0d1d6235ba251))
+* **bb:** Namespace proof_system=>bb ([#4116](https://github.com/AztecProtocol/aztec-packages/issues/4116)) ([7438db3](https://github.com/AztecProtocol/aztec-packages/commit/7438db31b29860aa2c0af54afa8413711a24e1eb))
+* **docs:** Aztec-up doesnt need `latest`, remove warnings around sandbox/cli npm pkgs ([#4138](https://github.com/AztecProtocol/aztec-packages/issues/4138)) ([2bbf7a9](https://github.com/AztecProtocol/aztec-packages/commit/2bbf7a919172bea9842b4e65129160e0e4ee0050))
+* **docs:** Update js release notes for 0.18.0 ([#4051](https://github.com/AztecProtocol/aztec-packages/issues/4051)) ([bdbe963](https://github.com/AztecProtocol/aztec-packages/commit/bdbe963b114813a49017daebe5b34757692328ce))
+* **docs:** Update lsp install instructions ([#4110](https://github.com/AztecProtocol/aztec-packages/issues/4110)) ([3138816](https://github.com/AztecProtocol/aztec-packages/commit/3138816b8b7480bd85eab8739e1d0bc72a5a5361)), closes [#4098](https://github.com/AztecProtocol/aztec-packages/issues/4098)
+* Dont mirror build-system mirror_repos.yml ([#4067](https://github.com/AztecProtocol/aztec-packages/issues/4067)) ([04f8e0d](https://github.com/AztecProtocol/aztec-packages/commit/04f8e0dfde5a3d4f54621726891aedc071212a8a))
+* Fixes many broken urls ([#4109](https://github.com/AztecProtocol/aztec-packages/issues/4109)) ([41ae75c](https://github.com/AztecProtocol/aztec-packages/commit/41ae75cdee6285729551965972e8cb039ff3045a))
+* Remove dependency cycles in `sequencer-client` ([#4017](https://github.com/AztecProtocol/aztec-packages/issues/4017)) ([fe4538b](https://github.com/AztecProtocol/aztec-packages/commit/fe4538b36c1cdb19c0c7245f7a73c9f5ee131a4a))
+* Remove lodash times in favor of foundation fn ([#3877](https://github.com/AztecProtocol/aztec-packages/issues/3877)) ([a10eef0](https://github.com/AztecProtocol/aztec-packages/commit/a10eef0a77cb52e00ffedb10ed325bd63fa0c971))
+* Remove unnecessary computation ([#4133](https://github.com/AztecProtocol/aztec-packages/issues/4133)) ([f35bdb8](https://github.com/AztecProtocol/aztec-packages/commit/f35bdb84722dbd01535da5542a0ec7c1fb96e5c7))
+* Remove unused noir-version json ([#4105](https://github.com/AztecProtocol/aztec-packages/issues/4105)) ([afca819](https://github.com/AztecProtocol/aztec-packages/commit/afca819166b9b5882b5d94062ac50cbb8dc590fb))
+* Remove unwanted submodules ([#4085](https://github.com/AztecProtocol/aztec-packages/issues/4085)) ([dda7c9c](https://github.com/AztecProtocol/aztec-packages/commit/dda7c9c4fa8da54d28b99b1cf601328030485503))
+* Replace relative paths to noir-protocol-circuits ([44d9136](https://github.com/AztecProtocol/aztec-packages/commit/44d91361274a54f0e59f0ad5f8869f3f3aa49c2b))
+* Replace relative paths to noir-protocol-circuits ([84b0bad](https://github.com/AztecProtocol/aztec-packages/commit/84b0bad61a5fc751fdf01ae907bb9b7df3bece7b))
+
+
+### Documentation
+
+* **yellowpaper:** Refresh of avm instruction set ([#4081](https://github.com/AztecProtocol/aztec-packages/issues/4081)) ([52162ee](https://github.com/AztecProtocol/aztec-packages/commit/52162eed9ace2726c143a34520115c8530876187))
+
 ## [0.19.0](https://github.com/AztecProtocol/aztec-packages/compare/aztec-packages-v0.18.0...aztec-packages-v0.19.0) (2024-01-17)
 
 
diff --git a/barretenberg/CHANGELOG.md b/barretenberg/CHANGELOG.md
index 2d528f556f7..1cb919b85eb 100644
--- a/barretenberg/CHANGELOG.md
+++ b/barretenberg/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## [0.20.0](https://github.com/AztecProtocol/aztec-packages/compare/barretenberg-v0.19.0...barretenberg-v0.20.0) (2024-01-19)
+
+
+### Bug Fixes
+
+* Reinstate Ultra arith rec verifier test ([#3886](https://github.com/AztecProtocol/aztec-packages/issues/3886)) ([995973b](https://github.com/AztecProtocol/aztec-packages/commit/995973b0226ddd7ae4cb5c3501859bec10f4eb93))
+* Upload_benchmarks_to_s3.sh missing exit ([#4046](https://github.com/AztecProtocol/aztec-packages/issues/4046)) ([52a9327](https://github.com/AztecProtocol/aztec-packages/commit/52a93279e43ae6780e8bfc253ee0570a443ed472))
+
+
+### Miscellaneous
+
+* **bb:** Namespace proof_system=>bb ([#4116](https://github.com/AztecProtocol/aztec-packages/issues/4116)) ([7438db3](https://github.com/AztecProtocol/aztec-packages/commit/7438db31b29860aa2c0af54afa8413711a24e1eb))
+* Remove unwanted submodules ([#4085](https://github.com/AztecProtocol/aztec-packages/issues/4085)) ([dda7c9c](https://github.com/AztecProtocol/aztec-packages/commit/dda7c9c4fa8da54d28b99b1cf601328030485503))
+
 ## [0.19.0](https://github.com/AztecProtocol/aztec-packages/compare/barretenberg-v0.18.0...barretenberg-v0.19.0) (2024-01-17)
 
 
diff --git a/barretenberg/cpp/CMakeLists.txt b/barretenberg/cpp/CMakeLists.txt
index e3e4e89f868..37e433c5912 100644
--- a/barretenberg/cpp/CMakeLists.txt
+++ b/barretenberg/cpp/CMakeLists.txt
@@ -6,7 +6,7 @@ cmake_minimum_required(VERSION 3.24)
 project(
     Barretenberg
     DESCRIPTION "BN254 elliptic curve library, and PLONK SNARK prover"
-    VERSION 0.19.0 # x-release-please-version
+    VERSION 0.20.0 # x-release-please-version
     LANGUAGES CXX C
 )
 # Insert version into `bb` config file
diff --git a/barretenberg/ts/CHANGELOG.md b/barretenberg/ts/CHANGELOG.md
index bb9690faac7..bbfd41cb601 100644
--- a/barretenberg/ts/CHANGELOG.md
+++ b/barretenberg/ts/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.20.0](https://github.com/AztecProtocol/aztec-packages/compare/barretenberg.js-v0.19.0...barretenberg.js-v0.20.0) (2024-01-19)
+
+
+### Miscellaneous
+
+* **barretenberg.js:** Synchronize aztec-packages versions
+
 ## [0.19.0](https://github.com/AztecProtocol/aztec-packages/compare/barretenberg.js-v0.18.0...barretenberg.js-v0.19.0) (2024-01-17)
 
 
diff --git a/barretenberg/ts/package.json b/barretenberg/ts/package.json
index bca350451b0..59b2a7236b0 100644
--- a/barretenberg/ts/package.json
+++ b/barretenberg/ts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@aztec/bb.js",
-  "version": "0.19.0",
+  "version": "0.20.0",
   "homepage": "https://github.com/AztecProtocol/aztec-packages/tree/master/barretenberg/ts",
   "license": "MIT",
   "type": "module",