diff --git a/package.json b/package.json
index 4c4132b..1893adc 100644
--- a/package.json
+++ b/package.json
@@ -78,6 +78,9 @@
                 "propertyNames": [
                     "schemas"
                 ]
+            },
+            "definitionSources": {
+                "multipleSources": true
             }
         }
     },