diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d4765e..72d5fa3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.7.4](https://github.com/googleapis/python-workflows/compare/v1.7.3...v1.7.4) (2022-10-07)
+
+
+### Bug Fixes
+
+* **deps:** Allow protobuf 3.19.5 ([#223](https://github.com/googleapis/python-workflows/issues/223)) ([cb3f23b](https://github.com/googleapis/python-workflows/commit/cb3f23bdc740324ed8031451214332209805ed45))
+
 ## [1.7.3](https://github.com/googleapis/python-workflows/compare/v1.7.2...v1.7.3) (2022-09-29)
 
 
diff --git a/setup.py b/setup.py
index 751000f..2aaac40 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
 import os
 import setuptools  # type: ignore
 
-version = "1.7.3"
+version = "1.7.4"
 
 package_root = os.path.abspath(os.path.dirname(__file__))
 
@@ -48,7 +48,7 @@
     install_requires=(
         "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",
     ),
     python_requires=">=3.7",
     classifiers=[
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index 260e08b..5dcaa6f 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -7,4 +7,4 @@
 # Then this file should have foo==1.14.0
 google-api-core==1.32.0
 proto-plus==1.22.0
-protobuf==3.20.2
+protobuf==3.19.5