diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6269f50e..2503670a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-cloud-texttospeech/#history
 
+## [1.0.3](https://github.com/googleapis/python-texttospeech/compare/v1.0.2...v1.0.3) (2022-06-09)
+
+
+### Bug Fixes
+
+* **deps:** require protobuf<4.0.0 on v1 branch ([#299](https://github.com/googleapis/python-texttospeech/issues/299)) ([a583f0e](https://github.com/googleapis/python-texttospeech/commit/a583f0eea2c52e910d67b1f120ddac5d7107124b))
+
 ### [1.0.2](https://github.com/googleapis/python-texttospeech/compare/v1.0.1...v1.0.2) (2022-03-31)
 
 
diff --git a/setup.py b/setup.py
index 3ec6e149..88b18b03 100644
--- a/setup.py
+++ b/setup.py
@@ -35,14 +35,15 @@
 
 name = "google-cloud-texttospeech"
 description = "Google Cloud Text-to-Speech API client library"
-version = "1.0.2"
+version = "1.0.3"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'
 # 'Development Status :: 5 - Production/Stable'
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
-    "google-api-core[grpc] >= 1.31.5, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.0"
+    "google-api-core[grpc] >= 1.31.5, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.0",
+    "protobuf<4.0.0dev",
 ]
 extras = {}