diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index fe87cd91..26548fff 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.43.0"
+  ".": "0.43.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5030db89..2ffc5063 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+## 0.43.1 (2025-01-17)
+
+Full Changelog: [v0.43.0...v0.43.1](https://github.com/anthropics/anthropic-sdk-python/compare/v0.43.0...v0.43.1)
+
+### Bug Fixes
+
+* **docs:** correct results return type ([69ad511](https://github.com/anthropics/anthropic-sdk-python/commit/69ad5112596f6e9aaf5cd2d495cb57516f2afbd4))
+
+
+### Chores
+
+* **internal:** bump pyright dependency ([#822](https://github.com/anthropics/anthropic-sdk-python/issues/822)) ([f8ddb90](https://github.com/anthropics/anthropic-sdk-python/commit/f8ddb90112a432a750fd4123c747ca581cff54ab))
+* **internal:** fix lint ([483cc27](https://github.com/anthropics/anthropic-sdk-python/commit/483cc277b66cb5b1a767e9d91347f22bcf69dc28))
+* **streaming:** add runtime type check for better error messages ([#826](https://github.com/anthropics/anthropic-sdk-python/issues/826)) ([cf69e09](https://github.com/anthropics/anthropic-sdk-python/commit/cf69e091d230aa0befb6ace74e64357b1cf2e4cd))
+* **types:** add more discriminator metadata ([#825](https://github.com/anthropics/anthropic-sdk-python/issues/825)) ([d0de8e5](https://github.com/anthropics/anthropic-sdk-python/commit/d0de8e564038cc6f801dc663b1938ac571ab47be))
+
 ## 0.43.0 (2025-01-14)
 
 Full Changelog: [v0.42.0...v0.43.0](https://github.com/anthropics/anthropic-sdk-python/compare/v0.42.0...v0.43.0)
diff --git a/pyproject.toml b/pyproject.toml
index aca83dfb..8c212000 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "anthropic"
-version = "0.43.0"
+version = "0.43.1"
 description = "The official Python library for the anthropic API"
 dynamic = ["readme"]
 license = "MIT"
diff --git a/src/anthropic/_version.py b/src/anthropic/_version.py
index 6b3c4840..7b3b0075 100644
--- a/src/anthropic/_version.py
+++ b/src/anthropic/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "anthropic"
-__version__ = "0.43.0"  # x-release-please-version
+__version__ = "0.43.1"  # x-release-please-version