diff --git a/CHANGELOG.md b/CHANGELOG.md
index bac55a5dc..9de8c27b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@
 [1]: https://pypi.org/project/google-cloud-pubsub/#history
 
 
+## [2.11.1](https://github.com/googleapis/python-pubsub/compare/v2.11.0...v2.11.1) (2022-06-08)
+
+
+### Bug Fixes
+
+* **deps:** require protobuf<4.0.0 on v0 branch ([#713](https://github.com/googleapis/python-pubsub/issues/713)) ([ed635d7](https://github.com/googleapis/python-pubsub/commit/ed635d7318b7e54cf45a4dcc217b9a712ca1aa10))
+
 ## [2.11.0](https://github.com/googleapis/python-pubsub/compare/v2.10.0...v2.11.0) (2022-03-09)
 
 
diff --git a/noxfile.py b/noxfile.py
index e9fea8af8..7852c0d71 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -104,7 +104,7 @@ def lint(session):
     Returns a failure if the linters find linting errors or sufficiently
     serious code quality issues.
     """
-    session.install("flake8", BLACK_VERSION)
+    session.install("flake8", BLACK_VERSION, "click<8.1")
     session.run(
         "black", "--check", *BLACK_PATHS,
     )
@@ -114,7 +114,7 @@ def lint(session):
 @nox.session(python=DEFAULT_PYTHON_VERSION)
 def blacken(session):
     """Run black. Format code to uniform standard."""
-    session.install(BLACK_VERSION)
+    session.install(BLACK_VERSION, "click<8.1")
     session.run(
         "black", *BLACK_PATHS,
     )
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index f47d14979..ac58c1298 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,2 +1,2 @@
-google-cloud-pubsub==2.10.0
+google-cloud-pubsub==2.11.0
 avro==1.11.0
diff --git a/setup.py b/setup.py
index 8624885b5..10d460bef 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
 
 name = "google-cloud-pubsub"
 description = "Google Cloud Pub/Sub API client library"
-version = "2.11.0"
+version = "2.11.1"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'
@@ -34,9 +34,10 @@
     # Until this issue is closed
     # 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",
+    "proto-plus >= 1.15.0, <2.0.0dev",
     "grpc-google-iam-v1 >= 0.12.3, < 0.13dev",
-    "grpcio-status >= 1.16.0",
+    "grpcio-status >= 1.16.0, <2.0.0dev",
+    "protobuf<4.0.0dev",
 ]
 extras = {"libcst": "libcst >= 0.3.10"}