diff --git a/yanic/yanic.conf.tmpl b/yanic/yanic.conf.tmpl
index 0a1f06f..4f11805 100644
--- a/yanic/yanic.conf.tmpl
+++ b/yanic/yanic.conf.tmpl
@@ -77,7 +77,7 @@ path = "/srv/yanic/meshviewer-freising.json"
 
 [nodes.output.meshviewer-ffrgb.filter]
 domain_as_site = true
-sites = "ffmuc_freising"
+sites = ["ffmuc_freising"]
 
 [[nodes.output.geojson]]
 enable   = true