diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32826699..a65119be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.5.2](https://github.com/googleapis/python-documentai/compare/v0.5.1...v0.5.2) (2022-06-07)
+
+
+### Bug Fixes
+
+* **deps:** require protobuf<4.0.0 on v0 branch ([#339](https://github.com/googleapis/python-documentai/issues/339)) ([7d1caea](https://github.com/googleapis/python-documentai/commit/7d1caeab47ca004fee0916f285317c2831d06ae3))
+
 ### [0.5.1](https://github.com/googleapis/python-documentai/compare/v0.5.0...v0.5.1) (2022-05-19)
 
 
diff --git a/setup.py b/setup.py
index 26f35c53..44e5880e 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
 import os
 import setuptools  # type: ignore
 
-version = "0.5.1"
+version = "0.5.2"
 
 package_root = os.path.abspath(os.path.dirname(__file__))
 
@@ -42,7 +42,8 @@
     include_package_data=True,
     install_requires=(
         "google-api-core[grpc] >= 1.31.5, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.0",
-        "proto-plus >= 1.10.0",
+        "proto-plus >= 1.10.0,<2.0.0dev",
+        "protobuf<4.0.0dev",
     ),
     python_requires=">=3.6",
     setup_requires=["libcst >= 0.2.5"],