diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e1589c3bdf5..e5cbfafe9d2 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "3.42.0"
+    ".": "3.43.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01e5229479c..5f15c20ac72 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,15 @@
 
 [1]: https://pypi.org/project/google-cloud-spanner/#history
 
+## [3.43.0](https://github.com/googleapis/python-spanner/compare/v3.42.0...v3.43.0) (2024-02-13)
+
+
+### Features
+
+* Add support for max commit delay ([#1050](https://github.com/googleapis/python-spanner/issues/1050)) ([d5acc26](https://github.com/googleapis/python-spanner/commit/d5acc263d86fcbde7d5f972930255119e2f60e76))
+* Exposing Spanner client in dbapi connection ([#1100](https://github.com/googleapis/python-spanner/issues/1100)) ([9299212](https://github.com/googleapis/python-spanner/commit/9299212fb8aa6ed27ca40367e8d5aaeeba80c675))
+* Untyped param ([#1001](https://github.com/googleapis/python-spanner/issues/1001)) ([1750328](https://github.com/googleapis/python-spanner/commit/1750328bbc7f8a1125f8e0c38024ced8e195a1b9))
+
 ## [3.42.0](https://github.com/googleapis/python-spanner/compare/v3.41.0...v3.42.0) (2024-01-30)
 
 
diff --git a/google/cloud/spanner_admin_database_v1/gapic_version.py b/google/cloud/spanner_admin_database_v1/gapic_version.py
index 5acda5fd9b6..9519d061598 100644
--- a/google/cloud/spanner_admin_database_v1/gapic_version.py
+++ b/google/cloud/spanner_admin_database_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "3.42.0"  # {x-release-please-version}
+__version__ = "3.43.0"  # {x-release-please-version}
diff --git a/google/cloud/spanner_admin_instance_v1/gapic_version.py b/google/cloud/spanner_admin_instance_v1/gapic_version.py
index 5acda5fd9b6..9519d061598 100644
--- a/google/cloud/spanner_admin_instance_v1/gapic_version.py
+++ b/google/cloud/spanner_admin_instance_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "3.42.0"  # {x-release-please-version}
+__version__ = "3.43.0"  # {x-release-please-version}
diff --git a/google/cloud/spanner_v1/gapic_version.py b/google/cloud/spanner_v1/gapic_version.py
index 5acda5fd9b6..9519d061598 100644
--- a/google/cloud/spanner_v1/gapic_version.py
+++ b/google/cloud/spanner_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "3.42.0"  # {x-release-please-version}
+__version__ = "3.43.0"  # {x-release-please-version}
diff --git a/samples/generated_samples/snippet_metadata_google.spanner.admin.database.v1.json b/samples/generated_samples/snippet_metadata_google.spanner.admin.database.v1.json
index eadd88950b0..d82a3d122c8 100644
--- a/samples/generated_samples/snippet_metadata_google.spanner.admin.database.v1.json
+++ b/samples/generated_samples/snippet_metadata_google.spanner.admin.database.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-spanner-admin-database",
-    "version": "3.42.0"
+    "version": "3.43.0"
   },
   "snippets": [
     {
diff --git a/samples/generated_samples/snippet_metadata_google.spanner.admin.instance.v1.json b/samples/generated_samples/snippet_metadata_google.spanner.admin.instance.v1.json
index 63d632ab616..d5bccd9177f 100644
--- a/samples/generated_samples/snippet_metadata_google.spanner.admin.instance.v1.json
+++ b/samples/generated_samples/snippet_metadata_google.spanner.admin.instance.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-spanner-admin-instance",
-    "version": "3.42.0"
+    "version": "3.43.0"
   },
   "snippets": [
     {
diff --git a/samples/generated_samples/snippet_metadata_google.spanner.v1.json b/samples/generated_samples/snippet_metadata_google.spanner.v1.json
index ecec16b3e38..468b6aac824 100644
--- a/samples/generated_samples/snippet_metadata_google.spanner.v1.json
+++ b/samples/generated_samples/snippet_metadata_google.spanner.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-spanner",
-    "version": "3.42.0"
+    "version": "3.43.0"
   },
   "snippets": [
     {