diff --git a/plinth/modules/matrixsynapse/__init__.py b/plinth/modules/matrixsynapse/__init__.py
index cdc35df3d..1241c9ff7 100644
--- a/plinth/modules/matrixsynapse/__init__.py
+++ b/plinth/modules/matrixsynapse/__init__.py
@@ -49,7 +49,7 @@ class MatrixSynapseApp(app_module.App):
 
     app_id = 'matrixsynapse'
 
-    _version = 10
+    _version = 11
 
     def __init__(self) -> None:
         """Create components for the app."""
diff --git a/plinth/modules/matrixsynapse/privileged.py b/plinth/modules/matrixsynapse/privileged.py
index 8f29caaec..c6cd62fe0 100644
--- a/plinth/modules/matrixsynapse/privileged.py
+++ b/plinth/modules/matrixsynapse/privileged.py
@@ -29,8 +29,7 @@ FREEDOMBOX_ADMIN_USERNAME = 'freedombox-admin'
 ADMIN_API_BASE = 'http://localhost:8008/_synapse/admin/v1/'
 
 STATIC_CONFIG = {
-    'max_upload_size':
-        '100M',
+    'max_upload_size': '100M',
     'password_providers': [{
         'module': 'ldap_auth_provider.LdapAuthProvider',
         'config': {
@@ -45,6 +44,10 @@ STATIC_CONFIG = {
             },
         },
     }, ],
+    'suppress_key_server_warning': True,
+    'trusted_key_servers': [{
+        'server_name': 'matrix.org'
+    }, ],
 }