diff --git a/gpapi/googleplay.py b/gpapi/googleplay.py
index 57f23e1..60c6ca6 100644
--- a/gpapi/googleplay.py
+++ b/gpapi/googleplay.py
@@ -532,7 +532,8 @@ def delivery(self, packageName, versionCode=None, offerType=1,
 
         if versionCode is None:
             # pick up latest version
-            versionCode = self.details(packageName).get('versionCode')
+            appDetails = self.details(packageName).get('details').get('appDetails')
+            versionCode = appDetails.get('versionCode')
 
         params = {'ot': str(offerType),
                   'doc': packageName,