diff --git a/matrix.yml b/matrix.yml
index 64fca07..f5c39cb 100644
--- a/matrix.yml
+++ b/matrix.yml
@@ -439,7 +439,7 @@
           sleep 120
           cd /home/docker/matrix.{{inventory_hostname}} || exit 1
           . ./env
-          docker compose exec matrix.{{inventory_hostname}} register_new_matrix_user -c /data/homeserver.yaml -a -u mx-admin -p $MATRIX_ADMIN_PASSWORD http://localhost:8008 >matrix.init.log 2>&1
+          docker compose exec matrix.{{inventory_hostname}}--synapse register_new_matrix_user -c /data/homeserver.yaml -a -u mx-admin -p $MATRIX_ADMIN_PASSWORD http://localhost:8008 >matrix.init.log 2>&1
         backup: yes
         validate: /bin/bash -n %s
 #      notify: run matrix.init