diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 2aed50b..4fcfdf7 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.8.3"
+  ".": "1.9.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12e8b00..665c1c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [1.9.0](https://github.com/googleapis/python-org-policy/compare/v1.8.3...v1.9.0) (2023-12-07)
+
+
+### Features
+
+* Add support for Python 3.12 ([#242](https://github.com/googleapis/python-org-policy/issues/242)) ([400b684](https://github.com/googleapis/python-org-policy/commit/400b6843a6cc929ad9f22d79ad34acb172ca92fe))
+* Introduce compatibility with native namespace packages ([#241](https://github.com/googleapis/python-org-policy/issues/241)) ([bac1c15](https://github.com/googleapis/python-org-policy/commit/bac1c150be981f6275ef3717187fcac4aba55eed))
+
+
+### Bug Fixes
+
+* Use `retry_async` instead of `retry` in async client ([78d90a3](https://github.com/googleapis/python-org-policy/commit/78d90a37c03a8ac0825ac3890f61e2496a86bab6))
+
 ## [1.8.3](https://github.com/googleapis/python-org-policy/compare/v1.8.2...v1.8.3) (2023-11-09)
 
 
diff --git a/google/cloud/orgpolicy/gapic_version.py b/google/cloud/orgpolicy/gapic_version.py
index 91ef154..163d151 100644
--- a/google/cloud/orgpolicy/gapic_version.py
+++ b/google/cloud/orgpolicy/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/orgpolicy_v2/gapic_version.py b/google/cloud/orgpolicy_v2/gapic_version.py
index 91ef154..163d151 100644
--- a/google/cloud/orgpolicy_v2/gapic_version.py
+++ b/google/cloud/orgpolicy_v2/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/samples/generated_samples/snippet_metadata_google.cloud.orgpolicy.v2.json b/samples/generated_samples/snippet_metadata_google.cloud.orgpolicy.v2.json
index 89b8f4e..7fa6f49 100644
--- a/samples/generated_samples/snippet_metadata_google.cloud.orgpolicy.v2.json
+++ b/samples/generated_samples/snippet_metadata_google.cloud.orgpolicy.v2.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-org-policy",
-    "version": "0.1.0"
+    "version": "1.9.0"
   },
   "snippets": [
     {