diff --git a/connect_ext_ppr/webapp.py b/connect_ext_ppr/webapp.py
index fa38fe7..f6dc177 100644
--- a/connect_ext_ppr/webapp.py
+++ b/connect_ext_ppr/webapp.py
@@ -281,7 +281,7 @@ def list_deployment_request_marketplaces(
         ).filter_by(deployment_request=dr.id)
 
         marketplaces_pprs = {m.marketplace: m.ppr for m in marketplaces}
-        marketplaces_data = get_marketplaces(client, marketplaces_pprs.keys())
+        marketplaces_data = get_marketplaces(client, list(marketplaces_pprs.keys()))
 
         for marketplace in marketplaces_data:
             marketplaces_list.append(