diff --git a/lib/admin/config.js b/lib/admin/config.js
index dd4347cd..c6e189bb 100644
--- a/lib/admin/config.js
+++ b/lib/admin/config.js
@@ -104,7 +104,7 @@ function fetchConfigGroup (code) {
         'fiatCurrency'
       ]
 
-      const smush = _.flow(_.flatten, _.compact, _.uniq)
+      const smush = _.flow(_.flattenDeep, _.compact, _.uniq)
       const configFields = smush(candidateFields)
 
       // Expand this to check against full schema