diff --git a/my/spoor/content/external.json b/my/spoor/content/external.json
index a3e0054..93176ec 100644
--- a/my/spoor/content/external.json
+++ b/my/spoor/content/external.json
@@ -25,9 +25,9 @@
             }
           },
           "overrides": {
-            "type": "object",
+            "type": "union",
             "description": "User defined overrides for the returned content",
-            "properties": {}
+            "refs": []
           }
         }
       }