diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 1f92ad29..ca1cd588 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,4 +1,4 @@
 {
-    ".": "1.8.3"
+    ".": "1.9.0"
 }
   
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec81a728..1a3d0f41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog
 
+## [1.9.0](https://github.com/googleapis/python-pubsublite/compare/v1.8.3...v1.9.0) (2023-12-10)
+
+
+### Features
+
+* Add support for Python 3.12 ([#455](https://github.com/googleapis/python-pubsublite/issues/455)) ([e865cb3](https://github.com/googleapis/python-pubsublite/commit/e865cb341408c722f8f938c01a8ad863cef35cb7))
+* Introduce compatibility with native namespace packages ([#454](https://github.com/googleapis/python-pubsublite/issues/454)) ([e718522](https://github.com/googleapis/python-pubsublite/commit/e7185226a3287bd723d39d82d087214017efbeab))
+
+
+### Bug Fixes
+
+* Use `retry_async` instead of `retry` in async client ([#458](https://github.com/googleapis/python-pubsublite/issues/458)) ([ac71140](https://github.com/googleapis/python-pubsublite/commit/ac71140be49d2fc70dad43b9200096f4efd33b89))
+
+
+### Documentation
+
+* Minor formatting ([2681fb8](https://github.com/googleapis/python-pubsublite/commit/2681fb8707bb31c5eaeb43cbadba87915a4986bb))
+
 ## [1.8.3](https://github.com/googleapis/python-pubsublite/compare/v1.8.2...v1.8.3) (2023-07-05)
 
 
diff --git a/google/cloud/pubsublite/gapic_version.py b/google/cloud/pubsublite/gapic_version.py
index 91ef154c..163d1511 100644
--- a/google/cloud/pubsublite/gapic_version.py
+++ b/google/cloud/pubsublite/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "1.8.3"  # {x-release-please-version}
+__version__ = "1.9.0"  # {x-release-please-version}
diff --git a/google/cloud/pubsublite_v1/gapic_version.py b/google/cloud/pubsublite_v1/gapic_version.py
index a016bdfe..163d1511 100644
--- a/google/cloud/pubsublite_v1/gapic_version.py
+++ b/google/cloud/pubsublite_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "1.6.0"  # {x-release-please-version}
+__version__ = "1.9.0"  # {x-release-please-version}
diff --git a/samples/generated_samples/snippet_metadata_google.cloud.pubsublite.v1.json b/samples/generated_samples/snippet_metadata_google.cloud.pubsublite.v1.json
index b2b99995..faa59075 100644
--- a/samples/generated_samples/snippet_metadata_google.cloud.pubsublite.v1.json
+++ b/samples/generated_samples/snippet_metadata_google.cloud.pubsublite.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-pubsublite",
-    "version": "0.1.0"
+    "version": "1.9.0"
   },
   "snippets": [
     {