diff --git a/.github/release-please.yml b/.github/release-please.yml
index 466597e..6def37a 100644
--- a/.github/release-please.yml
+++ b/.github/release-please.yml
@@ -1,2 +1,8 @@
 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: v0
+  handleGHRelease: true
+  releaseType: python
diff --git a/owlbot.py b/owlbot.py
index c230db9..4b3d533 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -77,4 +77,6 @@
     excludes=[".coveragerc"],  # the microgenerator has a good coveragerc file
 )
 
+python.configure_previous_major_version_branches()
+
 s.shell.run(["nox", "-s", "blacken"], hide_output=False)