diff --git a/CHANGELOG.md b/CHANGELOG.md
index fafbdcf..78090be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## [1.63.1](https://github.com/googleapis/python-api-common-protos/compare/v1.63.0...v1.63.1) (2024-05-30)
+## [1.63.1rc0](https://github.com/googleapis/python-api-common-protos/compare/v1.63.0...v1.63.1rc0) (2024-05-30)
 
 
 ### Bug Fixes
diff --git a/setup.py b/setup.py
index ad63508..996218e 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
 
 name = "googleapis-common-protos"
 description = "Common protobufs used in Google APIs"
-version = "1.63.1"
+version = "1.63.1rc0"
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "protobuf>=3.19.5,<6.0.0.dev0,!=3.20.0,!=3.20.1,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",