diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb5b2a1..1ab5322 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-cloud-redis/#history
 
+## [2.9.3](https://github.com/googleapis/python-redis/compare/v2.9.2...v2.9.3) (2022-10-07)
+
+
+### Bug Fixes
+
+* **deps:** Allow protobuf 3.19.5 ([#232](https://github.com/googleapis/python-redis/issues/232)) ([ba28603](https://github.com/googleapis/python-redis/commit/ba286039f3735d6990b3cc43320950acf804f353))
+
 ## [2.9.2](https://github.com/googleapis/python-redis/compare/v2.9.1...v2.9.2) (2022-10-03)
 
 
diff --git a/setup.py b/setup.py
index 2330638..ac9d25b 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 
 name = "google-cloud-redis"
 description = "Google Cloud Memorystore for Redis API client library"
-version = "2.9.2"
+version = "2.9.3"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'
@@ -30,7 +30,7 @@
 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 >= 1.22.0, <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 9c98bbf..28b4190 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -8,4 +8,4 @@
 google-api-core==1.32.0
 proto-plus==1.22.0
 libcst==0.2.5
-protobuf==3.20.2
+protobuf==3.19.5