diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 089feae7..675cb893 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.45.2"
+  ".": "0.45.3"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13a5a364..132a7723 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 0.45.3 (2025-02-02)
+
+Full Changelog: [v0.45.2...v0.45.3](https://github.com/anthropics/anthropic-sdk-python/compare/v0.45.2...v0.45.3)
+
+### Chores
+
+* **api:** update openapi spec url ([#852](https://github.com/anthropics/anthropic-sdk-python/issues/852)) ([461d821](https://github.com/anthropics/anthropic-sdk-python/commit/461d821965c61d98bf35a8b6fab5da55a2ddddef))
+* **internal:** reorder model constants ([#847](https://github.com/anthropics/anthropic-sdk-python/issues/847)) ([aadd531](https://github.com/anthropics/anthropic-sdk-python/commit/aadd5315868ce2eec17cc7d0e8ec4f0b6a4c3c87))
+* **internal:** update models used in tests ([aadd531](https://github.com/anthropics/anthropic-sdk-python/commit/aadd5315868ce2eec17cc7d0e8ec4f0b6a4c3c87))
+
 ## 0.45.2 (2025-01-27)
 
 Full Changelog: [v0.45.1...v0.45.2](https://github.com/anthropics/anthropic-sdk-python/compare/v0.45.1...v0.45.2)
diff --git a/pyproject.toml b/pyproject.toml
index 781b6728..8f86c522 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "anthropic"
-version = "0.45.2"
+version = "0.45.3"
 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 351b837e..3f6bab64 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__ = "0.45.2"  # x-release-please-version
+__version__ = "0.45.3"  # x-release-please-version