diff --git a/appDefinition.json b/appDefinition.json
index 8e7b101..f3cb630 100644
--- a/appDefinition.json
+++ b/appDefinition.json
@@ -11,8 +11,8 @@
   } ],
   "inputParameters" : [ ],
   "outputs" : [ {
-    "dataType" : "catalog",
-    "fileName" : "Catalog2.mat"
+    "dataType" : "gdf_csv",
+    "fileName" : "CatalogID.csv"
   } ],
   "requiredTools" : [ "matlab" ],
   "requiredComputationResources" : { }