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 8b0cb13..80502f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [1.1.1](https://github.com/googleapis/python-optimization/compare/v1.1.0...v1.1.1) (2022-08-11)
+
+
+### Bug Fixes
+
+* **deps:** allow protobuf < 5.0.0 ([#60](https://github.com/googleapis/python-optimization/issues/60)) ([9c52f0c](https://github.com/googleapis/python-optimization/commit/9c52f0c0c4553788826a8ba21e10def82737ae65))
+* **deps:** require proto-plus >= 1.22.0 ([9c52f0c](https://github.com/googleapis/python-optimization/commit/9c52f0c0c4553788826a8ba21e10def82737ae65))
+
 ## [1.1.0](https://github.com/googleapis/python-optimization/compare/v1.0.1...v1.1.0) (2022-08-05)
 
 
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index aa7a6c8..1007697 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-optimization==1.0.1
+google-cloud-optimization==1.1.0
 google-cloud-storage==2.5.0
diff --git a/setup.py b/setup.py
index 9327af1..560eee1 100644
--- a/setup.py
+++ b/setup.py
@@ -22,13 +22,13 @@
 
 name = "google-cloud-optimization"
 description = "Cloud Optimization API client library"
-version = "1.1.0"
+version = "1.1.1"
 release_status = "Development Status :: 5 - Production/Stable"
 url = "https://github.com/googleapis/python-optimization"
 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.*",
-    "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",
 ]
 
 package_root = os.path.abspath(os.path.dirname(__file__))
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index f61f150..810c7cb 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -5,5 +5,5 @@
 # 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==1.32.0
-proto-plus==1.15.0
+proto-plus==1.22.0
 protobuf==3.19.0