diff --git a/CHANGELOG.md b/CHANGELOG.md
index d912d7be..0b9a92e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-cloud-container/#history
 
+## [2.12.2](https://github.com/googleapis/python-container/compare/v2.12.1...v2.12.2) (2022-10-07)
+
+
+### Bug Fixes
+
+* **deps:** Allow protobuf 3.19.5 ([#305](https://github.com/googleapis/python-container/issues/305)) ([728fc48](https://github.com/googleapis/python-container/commit/728fc485d91c113a151dea2641ccfe163a5accaf))
+
 ## [2.12.1](https://github.com/googleapis/python-container/compare/v2.12.0...v2.12.1) (2022-10-03)
 
 
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index 2ab3c5fa..e55bbd4c 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,3 +1,3 @@
-google-cloud-container==2.12.0
-backoff==2.1.2
+google-cloud-container==2.12.1
+backoff==2.2.1
 pytest==7.1.3
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 42f86fce..033bb171 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 
 name = "google-cloud-container"
 description = "Google Container Engine API client library"
-version = "2.12.1"
+version = "2.12.2"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'
@@ -31,7 +31,7 @@
     "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 >= 1.22.0, <2.0.0dev",
-    "protobuf >= 3.20.2, <5.0.0dev",
+    "protobuf>=3.19.5,<5.0.0dev,!=3.20.0,!=3.20.1,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
 ]
 extras = {"libcst": "libcst >= 0.2.5"}
 
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index b9a70662..85c46d16 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -8,4 +8,4 @@
 google-api-core==1.32.0
 grpc-google-iam-v1==0.12.4
 proto-plus==1.22.0
-protobuf==3.20.2
+protobuf==3.19.5