diff --git a/CHANGELOG.md b/CHANGELOG.md
index f7699905e..efadf4672 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-cloud-pubsub/#history
 
+## [1.4.0](https://www.github.com/googleapis/python-pubsub/compare/v1.3.1...v1.4.0) (2020-03-06)
+
+
+### Features
+
+* **pubsub:** implement max_duration_per_lease_extension option ([#38](https://www.github.com/googleapis/python-pubsub/issues/38)) ([d911a2d](https://www.github.com/googleapis/python-pubsub/commit/d911a2dc8edf3c348ad3f128368b30e32dbc449e))
+
 ### [1.3.1](https://www.github.com/googleapis/python-pubsub/compare/v1.3.0...v1.3.1) (2020-02-28)
 
 
diff --git a/setup.py b/setup.py
index f78b1dc51..9cec9209e 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
 
 name = "google-cloud-pubsub"
 description = "Google Cloud Pub/Sub API client library"
-version = "1.3.1"
+version = "1.4.0"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'