diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 0eb02fd..c701359 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:9db98b055a7f8bd82351238ccaacfd3cda58cdf73012ab58b8da146368330021
-# created: 2022-07-25T16:02:49.174178716Z
+  digest: sha256:c6c965a4bf40c19011b11f87dbc801a66d3a23fbc6704102be064ef31c51f1c3
+# created: 2022-08-09T15:58:56.463048506Z
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index b46d730..7092a13 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
     - name: Setup Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: "3.10"
     - name: Install nox
@@ -26,7 +26,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
     - name: Setup Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: "3.10"
     - name: Install nox
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index f512a49..d2aee5b 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -10,7 +10,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
     - name: Setup Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: "3.10"
     - name: Install nox
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 5531b01..87ade4d 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -13,7 +13,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
     - name: Setup Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python }}
     - name: Install nox
@@ -39,7 +39,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
     - name: Setup Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: "3.10"
     - name: Install coverage
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bcc818d..37b56e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [2.12.3](https://github.com/googleapis/python-secret-manager/compare/v2.12.2...v2.12.3) (2022-08-11)
+
+
+### Bug Fixes
+
+* **deps:** allow protobuf < 5.0.0 ([#335](https://github.com/googleapis/python-secret-manager/issues/335)) ([34c5858](https://github.com/googleapis/python-secret-manager/commit/34c5858cbd1971f270e73d2af3b45ecaa4adb7e2))
+* **deps:** require proto-plus >= 1.22.0 ([34c5858](https://github.com/googleapis/python-secret-manager/commit/34c5858cbd1971f270e73d2af3b45ecaa4adb7e2))
+
 ## [2.12.2](https://github.com/googleapis/python-secret-manager/compare/v2.12.1...v2.12.2) (2022-08-08)
 
 
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index 6d34b72..632000e 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-secret-manager==2.12.1
+google-cloud-secret-manager==2.12.2
 google-crc32c==1.3.0
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 721cb60..5d8bc98 100644
--- a/setup.py
+++ b/setup.py
@@ -21,13 +21,13 @@
 
 name = "google-cloud-secret-manager"
 description = "Secret Manager API API client library"
-version = "2.12.2"
+version = "2.12.3"
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "google-api-core[grpc] >= 1.32.0, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*",
     "grpc-google-iam-v1 >= 0.12.4, <1.0.0dev",
-    "proto-plus >= 1.15.0, <2.0.0dev",
-    "protobuf >= 3.19.0, <4.0.0dev",
+    "proto-plus >= 1.22.0, <2.0.0dev",
+    "protobuf >= 3.19.0, <5.0.0dev",
 ]
 extras = {"libcst": "libcst >= 0.2.5"}
 
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index 39a7c58..ed0460d 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -7,6 +7,6 @@
 # Then this file should have foo==1.14.0
 google-api-core==1.32.0
 grpc-google-iam-v1==0.12.4
-proto-plus==1.15.0
+proto-plus==1.22.0
 libcst==0.2.5
 protobuf==3.19.0