diff --git a/api_core/CHANGELOG.md b/api_core/CHANGELOG.md
index 86c3351b1ab3..e081822c2f81 100644
--- a/api_core/CHANGELOG.md
+++ b/api_core/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-api-core/#history
 
+## 1.13.0
+
+06-24-2019 10:34 PDT
+
+### New Features
+- Add `client_options.ClientOptions` object. ([#8265](https://github.com/googleapis/google-cloud-python/pull/8265))
+
 ## 1.12.0
 
 06-18-2019 12:37 PDT
diff --git a/api_core/setup.py b/api_core/setup.py
index 52bba5c521e4..1deb129885ea 100644
--- a/api_core/setup.py
+++ b/api_core/setup.py
@@ -22,7 +22,7 @@
 
 name = "google-api-core"
 description = "Google API client core library"
-version = "1.12.0"
+version = "1.13.0"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'