diff --git a/CHANGELOG.md b/CHANGELOG.md
index 17692a1c0..18e9adebc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,17 @@
 
 All notable changes to this project will be documented in this file. See [conventional commits](https://www.conventionalcommits.org/) for commit guidelines.
 
+## [0.51.2](https://github.com/boundaryml/baml/compare/0.51.1..0.51.2) - 2024-07-24
+
+### Bug Fixes
+
+- use chatwoot for feedback, not doorbell (#818) - ([f749f2b](https://github.com/boundaryml/baml/commit/f749f2b19b247de2f050beccd1fe8e50b7625757)) - Samuel Lijin
+
+
+### UNMATCHED
+- Minor improvements across docs (#807) - ([bc0c176](https://github.com/boundaryml/baml/commit/bc0c1761699ee2485a0a8ee61cf4fda6b579f974)) - Anish Palakurthi
+- Add support for unions / maps / null in TypeBuilder. (#820) - ([8d9e92d](https://github.com/boundaryml/baml/commit/8d9e92d3050a67edbec5ee6056397becbcdb754b)) - hellovai
+
 ## [0.51.1](https://github.com/boundaryml/baml/compare/0.51.0..0.51.1) - 2024-07-21
 
 ### Features
diff --git a/engine/Cargo.lock b/engine/Cargo.lock
index 656399753..8b5895e93 100644
--- a/engine/Cargo.lock
+++ b/engine/Cargo.lock
@@ -687,7 +687,7 @@ dependencies = [
 
 [[package]]
 name = "baml"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "baml-lib",
@@ -728,7 +728,7 @@ dependencies = [
 
 [[package]]
 name = "baml-fmt"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "baml-lib",
@@ -750,7 +750,7 @@ dependencies = [
 
 [[package]]
 name = "baml-lib"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "base64 0.13.1",
  "dissimilar",
@@ -788,7 +788,7 @@ dependencies = [
 
 [[package]]
 name = "baml-runtime"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "ambassador",
  "anyhow",
@@ -868,7 +868,7 @@ dependencies = [
 
 [[package]]
 name = "baml-schema-build"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "baml-runtime",
@@ -900,7 +900,7 @@ dependencies = [
 
 [[package]]
 name = "baml-types"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "indexmap 2.2.6",
  "minijinja",
@@ -2278,7 +2278,7 @@ dependencies = [
 
 [[package]]
 name = "internal-baml-codegen"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "askama",
@@ -2300,7 +2300,7 @@ dependencies = [
 
 [[package]]
 name = "internal-baml-core"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "baml-types",
@@ -2334,7 +2334,7 @@ dependencies = [
 
 [[package]]
 name = "internal-baml-diagnostics"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "colored",
@@ -2347,7 +2347,7 @@ dependencies = [
 
 [[package]]
 name = "internal-baml-jinja"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "askama",
@@ -2365,7 +2365,7 @@ dependencies = [
 
 [[package]]
 name = "internal-baml-parser-database"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "baml-types",
  "colored",
@@ -2387,7 +2387,7 @@ dependencies = [
 
 [[package]]
 name = "internal-baml-prompt-parser"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "internal-baml-diagnostics",
  "internal-baml-schema-ast",
@@ -2399,7 +2399,7 @@ dependencies = [
 
 [[package]]
 name = "internal-baml-schema-ast"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "baml-types",
  "either",
@@ -2475,7 +2475,7 @@ checksum = "9dbbfed4e59ba9750e15ba154fdfd9329cee16ff3df539c2666b70f58cc32105"
 
 [[package]]
 name = "jsonish"
-version = "0.51.1"
+version = "0.51.2"
 dependencies = [
  "anyhow",
  "assert-json-diff",
diff --git a/engine/Cargo.toml b/engine/Cargo.toml
index b495639b7..74662ff57 100644
--- a/engine/Cargo.toml
+++ b/engine/Cargo.toml
@@ -60,7 +60,7 @@ internal-baml-core = { path = "baml-lib/baml-core" }
 internal-baml-jinja = { path = "baml-lib/jinja" }
 
 [workspace.package]
-version = "0.51.1"
+version = "0.51.2"
 authors = ["Boundary <contact@boundaryml.com>"]
 
 description = "BAML Toolchain"
diff --git a/engine/language-client-codegen/src/typescript/templates/tracing.ts.j2 b/engine/language-client-codegen/src/typescript/templates/tracing.ts.j2
index 275571706..bfebdabc9 100644
--- a/engine/language-client-codegen/src/typescript/templates/tracing.ts.j2
+++ b/engine/language-client-codegen/src/typescript/templates/tracing.ts.j2
@@ -10,7 +10,7 @@ DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX.upsertTags.bind(DO_NOT_
 const flush = () => {
   DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX.flush.bind(DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX)()
 }
-const onLogEvent = (callback: undefined | (event: BamlLogEvent) => void) =>
+const onLogEvent = (callback: undefined | ((event: BamlLogEvent) => void)) =>
 DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX.onLogEvent(callback)
 
 export { traceAsync, traceSync, setTags, flush, onLogEvent }
\ No newline at end of file
diff --git a/engine/language_client_python/pyproject.toml b/engine/language_client_python/pyproject.toml
index b476fc026..ea34c5d6e 100644
--- a/engine/language_client_python/pyproject.toml
+++ b/engine/language_client_python/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "baml-py"
-version = "0.51.1"
+version = "0.51.2"
 description = "BAML python bindings (pyproject.toml)"
 readme = "README.md"
 authors = [["Boundary", "contact@boundaryml.com"]]
diff --git a/engine/language_client_ruby/baml.gemspec b/engine/language_client_ruby/baml.gemspec
index 4dc892a43..367c17f47 100644
--- a/engine/language_client_ruby/baml.gemspec
+++ b/engine/language_client_ruby/baml.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name = "baml"
-  spec.version = "0.51.1"
+  spec.version = "0.51.2"
   spec.authors = ["BoundaryML"]
   spec.email = ["contact@boundaryml.com"]
 
diff --git a/engine/language_client_typescript/package.json b/engine/language_client_typescript/package.json
index 0f304169f..f5ffe4661 100644
--- a/engine/language_client_typescript/package.json
+++ b/engine/language_client_typescript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@boundaryml/baml",
-  "version": "0.51.1",
+  "version": "0.51.2",
   "description": "BAML typescript bindings (package.json)",
   "repository": {
     "type": "git",
diff --git a/integ-tests/typescript/baml_client/tracing.ts b/integ-tests/typescript/baml_client/tracing.ts
index 75638f124..df2682e13 100644
--- a/integ-tests/typescript/baml_client/tracing.ts
+++ b/integ-tests/typescript/baml_client/tracing.ts
@@ -27,7 +27,7 @@ DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX.upsertTags.bind(DO_NOT_
 const flush = () => {
   DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX.flush.bind(DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX)()
 }
-const onLogEvent = (callback: undefined | (event: BamlLogEvent) => void) =>
+const onLogEvent = (callback: undefined | ((event: BamlLogEvent) => void)) =>
 DO_NOT_USE_DIRECTLY_UNLESS_YOU_KNOW_WHAT_YOURE_DOING_CTX.onLogEvent(callback)
 
 export { traceAsync, traceSync, setTags, flush, onLogEvent }
\ No newline at end of file
diff --git a/integ-tests/typescript/tests/integ-tests.test.ts b/integ-tests/typescript/tests/integ-tests.test.ts
index dced62fac..2e41c7e76 100644
--- a/integ-tests/typescript/tests/integ-tests.test.ts
+++ b/integ-tests/typescript/tests/integ-tests.test.ts
@@ -438,8 +438,7 @@ describe('Integ tests', () => {
     )
 
     console.log('final ', res)
-    console.log('final ', res.modelDump())
-    console.log('final ', res.modelDumpJson())
+
     expect(res.hair_color).toEqual('black')
     expect(res.attributes['eye_color']).toEqual('blue')
     expect(res.attributes['facial_hair']).toEqual('beard')
diff --git a/tools/versions/engine.cfg b/tools/versions/engine.cfg
index f88738aa0..a82997c56 100644
--- a/tools/versions/engine.cfg
+++ b/tools/versions/engine.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.51.1
+current_version = 0.51.2
 commit = False
 tag = False
 parse = ^(?P<major>\d+)\.(?P<minor>\d+).(?P<patch>\d+)$
diff --git a/tools/versions/python.cfg b/tools/versions/python.cfg
index ee0ebfe63..76bb44223 100644
--- a/tools/versions/python.cfg
+++ b/tools/versions/python.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.51.1
+current_version = 0.51.2
 commit = False
 tag = False
 parse = ^(?P<major>\d+)\.(?P<minor>\d+).(?P<patch>\d+)$
diff --git a/tools/versions/ruby.cfg b/tools/versions/ruby.cfg
index 2a41b00d2..b1302fd3c 100644
--- a/tools/versions/ruby.cfg
+++ b/tools/versions/ruby.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.51.1
+current_version = 0.51.2
 commit = False
 tag = False
 parse = ^(?P<major>\d+)\.(?P<minor>\d+).(?P<patch>\d+)$
diff --git a/tools/versions/typescript.cfg b/tools/versions/typescript.cfg
index d3ff10650..53cd72872 100644
--- a/tools/versions/typescript.cfg
+++ b/tools/versions/typescript.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.51.1
+current_version = 0.51.2
 commit = False
 tag = False
 parse = ^(?P<major>\d+)\.(?P<minor>\d+).(?P<patch>\d+)$
diff --git a/tools/versions/vscode.cfg b/tools/versions/vscode.cfg
index fdef86823..6b8724ef4 100644
--- a/tools/versions/vscode.cfg
+++ b/tools/versions/vscode.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.51.1
+current_version = 0.51.2
 commit = False
 tag = False
 parse = ^(?P<major>\d+)\.(?P<minor>\d+).(?P<patch>\d+)$
diff --git a/typescript/vscode-ext/packages/package.json b/typescript/vscode-ext/packages/package.json
index f16b88059..bb5095a02 100644
--- a/typescript/vscode-ext/packages/package.json
+++ b/typescript/vscode-ext/packages/package.json
@@ -2,7 +2,7 @@
   "name": "baml-extension",
   "displayName": "Baml",
   "description": "BAML is a DSL for AI applications.",
-  "version": "0.51.1",
+  "version": "0.51.2",
   "publisher": "Boundary",
   "repository": "https://github.com/BoundaryML/baml",
   "homepage": "https://www.boundaryml.com",