diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d6a4c7..5f0137d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.0.5](https://github.com/googleapis/python-containeranalysis/compare/v1.0.4...v1.0.5) (2022-06-07)
+
+
+### Bug Fixes
+
+* **deps:** require protobuf<4.0.0 on v1 branch ([#296](https://github.com/googleapis/python-containeranalysis/issues/296)) ([87ce6a6](https://github.com/googleapis/python-containeranalysis/commit/87ce6a6fed7888f17f10ef08e12405ad97bff549))
+
 ### [1.0.4](https://github.com/googleapis/python-containeranalysis/compare/v1.0.3...v1.0.4) (2022-04-04)
 
 
diff --git a/setup.py b/setup.py
index 4ea8ae4..3b27411 100644
--- a/setup.py
+++ b/setup.py
@@ -22,13 +22,14 @@
 
 name = "google-cloud-containeranalysis"
 description = "Container Analysis API API client library"
-version = "1.0.4"
+version = "1.0.5"
 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",
     "grpc-google-iam-v1 >= 0.12.3, < 0.13dev",
     'enum34; python_version < "3.4"',
     "grafeas < 1.0.0dev",
+    "protobuf<4.0.0dev",
 ]