diff --git a/.github/release-please.yml b/.github/release-please.yml
index 466597e5..29601ad4 100644
--- a/.github/release-please.yml
+++ b/.github/release-please.yml
@@ -1,2 +1,11 @@
 releaseType: python
 handleGHRelease: true
+# NOTE: this section is generated by synthtool.languages.python
+# See https://github.com/googleapis/synthtool/blob/master/synthtool/languages/python.py
+branches:
+- branch: v1
+  handleGHRelease: true
+  releaseType: python
+- branch: v0
+  handleGHRelease: true
+  releaseType: python
diff --git a/owlbot.py b/owlbot.py
index 0b7f7d21..9d58f4a1 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -16,6 +16,7 @@
 
 import synthtool as s
 from synthtool import gcp
+from synthtool.languages import python
 
 common = gcp.CommonTemplates()
 
@@ -47,5 +48,6 @@
 
 s.replace(".github/workflows/lint.yml", "python-version: \"3.10\"", "python-version: \"3.7\"")
 
+python.configure_previous_major_version_branches()
 
 s.shell.run(["nox", "-s", "blacken"], hide_output=False)