diff --git a/legendary/core.py b/legendary/core.py
index a4a52d3..f24b84d 100644
--- a/legendary/core.py
+++ b/legendary/core.py
@@ -742,7 +742,8 @@ class LegendaryCore:
             '-EpicPortal',
             f'-epicusername={user_name}',
             f'-epicuserid={account_id}',
-            f'-epiclocale={language_code}'
+            f'-epiclocale={language_code}',
+            f'-epicsandboxid={game.namespace}'
         ])
 
         if extra_args: