diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f701c8396e..b58729ff4e 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.59.3"
+  ".": "1.59.4"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75d144cca6..0ae58461a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## 1.59.4 (2025-01-06)
+
+Full Changelog: [v1.59.3...v1.59.4](https://github.com/openai/openai-python/compare/v1.59.3...v1.59.4)
+
+### Chores
+
+* add missing isclass check ([#1988](https://github.com/openai/openai-python/issues/1988)) ([61d9072](https://github.com/openai/openai-python/commit/61d9072fbace58d64910ec7378c3686ac555972e))
+* add missing isclass check for structured outputs ([bcbf013](https://github.com/openai/openai-python/commit/bcbf013e8d825b8b5f88172313dfb6e0313ca34c))
+
 ## 1.59.3 (2025-01-03)
 
 Full Changelog: [v1.59.2...v1.59.3](https://github.com/openai/openai-python/compare/v1.59.2...v1.59.3)
diff --git a/pyproject.toml b/pyproject.toml
index b9d4abf59a..1866c89a87 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "openai"
-version = "1.59.3"
+version = "1.59.4"
 description = "The official Python library for the openai API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/openai/_version.py b/src/openai/_version.py
index 342d208d2b..86545ed82a 100644
--- a/src/openai/_version.py
+++ b/src/openai/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "openai"
-__version__ = "1.59.3"  # x-release-please-version
+__version__ = "1.59.4"  # x-release-please-version