Release api_core-1.5.1 (#6332)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0d601ee..890d88e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,24 +4,21 @@
[1]: https://pypi.org/project/google-api-core/#history
-## 1.6.0a1
+## 1.5.1
-10-18-2018 16:26 PDT
+10-29-2018 13:29 PDT
-### New Features
-- Add methods to api_core used by new autogenerator. ([#6267](https://github.com/googleapis/google-cloud-python/pull/6267))
+### Implementation Changes
+- Don't URL-encode slashes in gRPC request headers. ([#6310](https://github.com/googleapis/google-cloud-python/pull/6310))
### 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))
+- Back out changes from [#6267](https://github.com/googleapis/google-cloud-python/pull/6267) / `api_core-1.6.0a1` release. ([#6328](https://github.com/googleapis/google-cloud-python/pull/6328))
## 1.5.0
### New Features
- Add bidi, Bidirection Streaming, to api-core ([#6211](https://github.com/GoogleCloudPlatform/google-cloud-python/pull/6211))
-
### Internal / Testing Changes
- Use new Nox ([#6175](https://github.com/GoogleCloudPlatform/google-cloud-python/pull/6175))
diff --git a/setup.py b/setup.py
index 82668b3..fdff7c3 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
name = 'google-api-core'
description = 'Google API client core library'
-version = '1.6.0a1'
+version = '1.5.1'
# Should be one of:
# 'Development Status :: 3 - Alpha'
# 'Development Status :: 4 - Beta'