diff --git a/constraints/constraints-noble.txt b/constraints/constraints-noble.txt
new file mode 100644
index 0000000..91fb98e
--- /dev/null
+++ b/constraints/constraints-noble.txt
@@ -0,0 +1,9 @@
+# NOTE: this constraints file can be (and will be) consumed by downstream.
+#
+# Known consumers:
+# * zosci-config: job definitions that declare what juju version (snap channel)
+#   is used in tandem with this constraints file to lockdown python-libjuju
+#   version.
+# * zaza-openstack-tests
+#
+juju>=3.5.0,<3.6.0