diff --git a/examples/config/affiliation.json b/examples/config/affiliation.json
index 68802d9..4b9d6fc 100644
--- a/examples/config/affiliation.json
+++ b/examples/config/affiliation.json
@@ -7,8 +7,8 @@
     "retrieval-uri": "",
     "allow-free-text": true,
     "languages": "",
-    "vocabs": "",
+    "vocabs": {},
     "managed-fields": {},
     "retrieval-filtering": {}
   }
-]
\ No newline at end of file
+]