diff --git a/environments/undercloud.yaml b/environments/undercloud.yaml
index 559d81dfed..4bc16f8c29 100644
--- a/environments/undercloud.yaml
+++ b/environments/undercloud.yaml
@@ -20,3 +20,5 @@ parameter_defaults:
   HeatMaxJsonBodySize: 2097152
   IronicInspectorInterface: br-ctlplane
   IronicInspectorIpRange: '192.168.24.100,192.168.24.200'
+  ZaqarMessageStore: 'swift'
+  ZaqarManagementStore: 'sqlalchemy'
diff --git a/releasenotes/notes/zaqar_undercloud_backends-f63224a2a3aa684e.yaml b/releasenotes/notes/zaqar_undercloud_backends-f63224a2a3aa684e.yaml
new file mode 100644
index 0000000000..64a4142497
--- /dev/null
+++ b/releasenotes/notes/zaqar_undercloud_backends-f63224a2a3aa684e.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Update undercloud default Heat parameters so we use the Zaqar swift/mysql
+    backends. This allows us to drop MongoDB from the undercloud.
diff --git a/roles/Undercloud.yaml b/roles/Undercloud.yaml
index f56749a905..d462fb274d 100644
--- a/roles/Undercloud.yaml
+++ b/roles/Undercloud.yaml
@@ -26,7 +26,6 @@
     - OS::TripleO::Services::MistralApi
     - OS::TripleO::Services::MistralEngine
     - OS::TripleO::Services::MistralExecutor
-    - OS::TripleO::Services::MongoDb
     - OS::TripleO::Services::MySQL
     - OS::TripleO::Services::NeutronApi
     - OS::TripleO::Services::NeutronCorePlugin
diff --git a/roles_data_undercloud.yaml b/roles_data_undercloud.yaml
index 2aa5a291f8..2c8e479fc6 100644
--- a/roles_data_undercloud.yaml
+++ b/roles_data_undercloud.yaml
@@ -29,7 +29,6 @@
     - OS::TripleO::Services::MistralApi
     - OS::TripleO::Services::MistralEngine
     - OS::TripleO::Services::MistralExecutor
-    - OS::TripleO::Services::MongoDb
     - OS::TripleO::Services::MySQL
     - OS::TripleO::Services::NeutronApi
     - OS::TripleO::Services::NeutronCorePlugin