diff --git a/objects/report/definition.json b/objects/report/definition.json
index a0908ad..cce9d89 100644
--- a/objects/report/definition.json
+++ b/objects/report/definition.json
@@ -10,7 +10,8 @@
       "categories": [
         "Other",
         "Internal reference"
-      ]
+      ],
+      "multiple": true
     },
     "case-number": {
       "description": "Case number",