diff --git a/mautrix-whatsapp/config.yaml b/mautrix-whatsapp/config.yaml
index b16d28d..217d2f0 100644
--- a/mautrix-whatsapp/config.yaml
+++ b/mautrix-whatsapp/config.yaml
@@ -1,7 +1,7 @@
 # Homeserver details.
 homeserver:
     # The address that this appservice can use to connect to the homeserver.
-    address: https://matrix.server-nb.de
+    address: http://synapse:8008
     # The domain of the homeserver (also known as server_name, used for MXIDs, etc).
     domain: matrix.server-nb.de