diff --git a/app/matrix/lib/matrix.libsonnet b/app/matrix/lib/matrix.libsonnet
index c17a934..462a77d 100644
--- a/app/matrix/lib/matrix.libsonnet
+++ b/app/matrix/lib/matrix.libsonnet
@@ -82,9 +82,8 @@
 
     local ns = kube.Namespace(cfg.namespace),
 
-    postgres3: postgres {
+    postgres3: ns.Contain(postgres) {
         cfg+: {
-            namespace: cfg.namespace,
             appName: "synapse",
             database: "synapse",
             username: "synapse",