diff --git a/backup.sh b/backup.sh
index c283b93..8196dda 100755
--- a/backup.sh
+++ b/backup.sh
@@ -56,7 +56,7 @@ function etebase_backup {
 
 
 function synapse_backup {
-	docker exec -t synapse_postgres pg_dumpall -c -U synapse > "$synapsepg_datadir/dump.sql"
+	docker exec -t synapse-postgres pg_dumpall -c -U synapse > "$synapsepg_datadir/dump.sql"
 	compose_stop synapse
 	borg_create synapse
 	[[ $restart -eq 1 ]] && compose_start synapse