diff --git a/api_core/CHANGELOG.md b/api_core/CHANGELOG.md
index 6c652da80905..0d601ee6b85d 100644
--- a/api_core/CHANGELOG.md
+++ b/api_core/CHANGELOG.md
@@ -4,6 +4,18 @@
 
 [1]: https://pypi.org/project/google-api-core/#history
 
+## 1.6.0a1
+
+10-18-2018 16:26 PDT
+
+### New Features
+- Add methods to api_core used by new autogenerator. ([#6267](https://github.com/googleapis/google-cloud-python/pull/6267))
+
+### Internal / Testing Changes
+- Fix branch coverage for un-called callbacks. ([#6242](https://github.com/googleapis/google-cloud-python/pull/6242))
+- Fix import order, appeasing lint. ([#6240](https://github.com/googleapis/google-cloud-python/pull/6240))
+- Add / fix badges for PyPI / versions. ([#6158](https://github.com/googleapis/google-cloud-python/pull/6158))
+
 ## 1.5.0
 
 ### New Features
diff --git a/api_core/setup.py b/api_core/setup.py
index be0a35ebc188..82668b39ead5 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 = '1.5.0'
+version = '1.6.0a1'
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'