diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f760fdd07..de857800d 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,4 +1,4 @@
 {
-    ".": "2.27.3"
+    ".": "2.27.4"
 }
   
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69b1f0c27..0018d299a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@
 [1]: https://pypi.org/project/google-cloud-pubsub/#history
 
 
+## [2.27.4](https://github.com/googleapis/python-pubsub/compare/v2.27.3...v2.27.4) (2025-01-29)
+
+
+### Bug Fixes
+
+* Set creds only if transport not provided ([#1348](https://github.com/googleapis/python-pubsub/issues/1348)) ([59965a4](https://github.com/googleapis/python-pubsub/commit/59965a4804a434467a47815cdbdd5ce31bbb3662))
+
 ## [2.27.3](https://github.com/googleapis/python-pubsub/compare/v2.27.2...v2.27.3) (2025-01-24)
 
 
diff --git a/google/pubsub/gapic_version.py b/google/pubsub/gapic_version.py
index 03a0c3372..241ba0fb8 100644
--- a/google/pubsub/gapic_version.py
+++ b/google/pubsub/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.27.3"  # {x-release-please-version}
+__version__ = "2.27.4"  # {x-release-please-version}
diff --git a/google/pubsub_v1/gapic_version.py b/google/pubsub_v1/gapic_version.py
index 03a0c3372..241ba0fb8 100644
--- a/google/pubsub_v1/gapic_version.py
+++ b/google/pubsub_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.27.3"  # {x-release-please-version}
+__version__ = "2.27.4"  # {x-release-please-version}
diff --git a/samples/generated_samples/snippet_metadata_google.pubsub.v1.json b/samples/generated_samples/snippet_metadata_google.pubsub.v1.json
index f06040919..03d5452f0 100644
--- a/samples/generated_samples/snippet_metadata_google.pubsub.v1.json
+++ b/samples/generated_samples/snippet_metadata_google.pubsub.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-pubsub",
-    "version": "2.27.3"
+    "version": "2.27.4"
   },
   "snippets": [
     {