diff --git a/packages/google-cloud-os-login/.github/release-please.yml b/packages/google-cloud-os-login/.github/release-please.yml
index 466597e5b196..29601ad4692c 100644
--- a/packages/google-cloud-os-login/.github/release-please.yml
+++ b/packages/google-cloud-os-login/.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/packages/google-cloud-os-login/owlbot.py b/packages/google-cloud-os-login/owlbot.py
index 30071f5d8cf4..a1a537fa926b 100644
--- a/packages/google-cloud-os-login/owlbot.py
+++ b/packages/google-cloud-os-login/owlbot.py
@@ -80,4 +80,6 @@
 
 python.py_samples(skip_readmes=True)
 
+python.configure_previous_major_version_branches()
+
 s.shell.run(["nox", "-s", "blacken"], hide_output=False)