diff --git a/actions/matrixsynapse b/actions/matrixsynapse
index cd17d9d78..e61285e44 100755
--- a/actions/matrixsynapse
+++ b/actions/matrixsynapse
@@ -141,6 +141,7 @@ def subcommand_setup(arguments):
     domain_name = arguments.domain_name
     action_utils.dpkg_reconfigure('matrix-synapse',
                                   {'server-name': domain_name})
+    _update_tls_certificate()
     subcommand_enable(arguments)