diff --git a/.github/blunderbuss.yml b/.github/blunderbuss.yml
index 687c7f91b..992f04dce 100644
--- a/.github/blunderbuss.yml
+++ b/.github/blunderbuss.yml
@@ -1,6 +1,6 @@
 # Configuration for the Blunderbuss GitHub app. For more info see
 # https://github.com/googleapis/repo-automation-bots/tree/main/packages/blunderbuss
 assign_issues:
-  - pradn
+  - mukund-ananthu
 assign_prs:
-  - pradn
\ No newline at end of file
+  - mukund-ananthu
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 4c00940a5..a31cb5941 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,4 +1,4 @@
 {
-    ".": "2.19.2"
+    ".": "2.19.3"
 }
   
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31c167a02..d9f24c15c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@
 [1]: https://pypi.org/project/google-cloud-pubsub/#history
 
 
+## [2.19.3](https://github.com/googleapis/python-pubsub/compare/v2.19.2...v2.19.3) (2024-02-08)
+
+
+### Bug Fixes
+
+* Add google-auth as a direct dependency ([#1076](https://github.com/googleapis/python-pubsub/issues/1076)) ([5ce7301](https://github.com/googleapis/python-pubsub/commit/5ce7301b3056191203bc89bbcf1f33083de72a2d))
+
 ## [2.19.2](https://github.com/googleapis/python-pubsub/compare/v2.19.1...v2.19.2) (2024-02-08)
 
 
diff --git a/google/pubsub/gapic_version.py b/google/pubsub/gapic_version.py
index 72b71f9cd..3feb0e097 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__ = "2.19.2"  # {x-release-please-version}
+__version__ = "2.19.3"  # {x-release-please-version}
diff --git a/google/pubsub_v1/gapic_version.py b/google/pubsub_v1/gapic_version.py
index 72b71f9cd..3feb0e097 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__ = "2.19.2"  # {x-release-please-version}
+__version__ = "2.19.3"  # {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 fb45cf3da..259b241f7 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": "2.19.2"
+    "version": "2.19.3"
   },
   "snippets": [
     {
diff --git a/setup.py b/setup.py
index d388d9443..a6af31207 100644
--- a/setup.py
+++ b/setup.py
@@ -38,6 +38,7 @@
 dependencies = [
     "grpcio >= 1.51.3, < 2.0dev",  # https://github.com/googleapis/python-pubsub/issues/609
     # google-api-core >= 1.34.0 is allowed in order to support google-api-core 1.x
+    "google-auth >= 2.14.1, <3.0.0dev",
     "google-api-core[grpc] >= 1.34.0, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*,!=2.8.*,!=2.9.*,!=2.10.*",
     "proto-plus >= 1.22.0, <2.0.0dev",
     "proto-plus >= 1.22.2, <2.0.0dev; python_version>='3.11'",
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index 75ec7a623..ee447eb62 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -5,6 +5,7 @@
 # e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0dev",
 # Then this file should have google-cloud-foo==1.14.0
 google-api-core==1.34.0
+google-auth==2.14.1
 proto-plus==1.22.0
 protobuf==3.19.5
 grpc-google-iam-v1==0.12.4