diff --git a/CHANGELOG.md b/CHANGELOG.md
index e80e2f4b..c06b02c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 [1]: https://pypi.org/project/google-api-core/#history
 
-## [2.13.0](https://github.com/googleapis/python-api-core/compare/v2.12.0...v2.13.0) (2023-11-02)
+## [2.13.0rc1](https://github.com/googleapis/python-api-core/compare/v2.12.0...v2.13.0rc1) (2023-11-02)
 
 
 ### Features
diff --git a/google/api_core/version.py b/google/api_core/version.py
index b6000e20..2e56aa2b 100644
--- a/google/api_core/version.py
+++ b/google/api_core/version.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.13.0"
+__version__ = "2.13.0rc1"