diff --git a/configs/conferences/gpn21/config.json b/configs/conferences/gpn21/config.json
index d77096d9..151d618c 100644
--- a/configs/conferences/gpn21/config.json
+++ b/configs/conferences/gpn21/config.json
@@ -47,6 +47,15 @@
           "chat": {}
         }
       },
+      {
+        "guid": "",
+        "name": "Medientheater High Quality",
+        "slug": "demoscene",
+        "streamId": "demoscene",
+        "streamingConfig": {
+          "chat": {}
+        }
+      },
       {
         "guid": "",
         "name": "Vortragssaal",
@@ -55,7 +64,16 @@
         "streamingConfig": {
           "chat": {}
         }
+      },
+      {
+        "guid": "",
+        "name": "Blauer Salon",
+        "slug": "blauersalon",
+        "streamId": "s5",
+        "streamingConfig": {
+          "chat": {}
+        }
       }
     ]
   }
-}
+}
\ No newline at end of file