diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c1e6a6d..179f9cd 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.4.11"
+  ".": "1.4.12"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97be473..ae9e583 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 1.4.12 (2025-01-07)
+
+Full Changelog: [v1.4.11...v1.4.12](https://github.com/OneBusAway/python-sdk/compare/v1.4.11...v1.4.12)
+
+### Chores
+
+* add missing isclass check ([#212](https://github.com/OneBusAway/python-sdk/issues/212)) ([989d621](https://github.com/OneBusAway/python-sdk/commit/989d6218de97f5515ec741b5cc424cb8d7901362))
+
 ## 1.4.11 (2025-01-02)
 
 Full Changelog: [v1.4.10...v1.4.11](https://github.com/OneBusAway/python-sdk/compare/v1.4.10...v1.4.11)
diff --git a/pyproject.toml b/pyproject.toml
index 9af765e..490b6eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "onebusaway"
-version = "1.4.11"
+version = "1.4.12"
 description = "The official Python library for the onebusaway-sdk API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/onebusaway/_version.py b/src/onebusaway/_version.py
index 10d9b23..a6eb1bb 100644
--- a/src/onebusaway/_version.py
+++ b/src/onebusaway/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "onebusaway"
-__version__ = "1.4.11"  # x-release-please-version
+__version__ = "1.4.12"  # x-release-please-version