diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index b46d7305d..7092a139a 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 f512a4960..d2aee5b7d 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 e5be6edbd..612d89c32 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/samples/snippets/requirements-test.txt b/samples/snippets/requirements-test.txt
index 3f18f3b00..8bc5d00b2 100644
--- a/samples/snippets/requirements-test.txt
+++ b/samples/snippets/requirements-test.txt
@@ -1,4 +1,4 @@
-backoff==2.0.1
+backoff==2.1.2
 pytest==7.1.2
 mock==4.0.3
 flaky==3.7.0
\ No newline at end of file
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index 27904a8f7..f684cca8d 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-pubsub==2.12.1
+google-cloud-pubsub==2.13.0
 avro==1.11.0
diff --git a/setup.py b/setup.py
index fac5d5d2f..206168510 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,7 @@
     # https://github.com/googleapis/google-cloud-python/issues/10566
     "google-api-core[grpc] >= 1.31.5, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.0",
     "proto-plus >= 1.15.0, <2.0.0dev",
-    "protobuf >= 3.19.0, <4.0.0dev",
+    "protobuf >=4.21.1, <4.22.0",
     "grpc-google-iam-v1 >=0.12.4, <1.0.0dev",
     "grpcio-status >= 1.16.0",
 ]