diff --git a/back/models/image.json b/back/models/image.json
index 57e33a684..9e8704e5f 100644
--- a/back/models/image.json
+++ b/back/models/image.json
@@ -8,25 +8,23 @@
     },
     "properties": {
         "id": {
-            "type": "Number",
+            "type": "number",
             "id": true,
             "description": "The id"
         },
         "name": {
-            "type": "String",
+            "type": "string",
             "required": true
         },
         "collectionFk": {
-            "type": "String",
+            "type": "string",
             "required": true
         },
         "updated": {
-            "type": "Number"
+            "type": "number"
         },
         "nRefs": {
-            "type": "Number",
-            "required": true,
-            "default": 1
+            "type": "number"
         }
     },
     "relations": {