diff --git a/playbooks/stop_containers.yaml b/playbooks/stop_containers.yaml
index 5baa83e..ee1dc90 100644
--- a/playbooks/stop_containers.yaml
+++ b/playbooks/stop_containers.yaml
@@ -14,7 +14,7 @@
 - debug:
     msg: "{{ docker_containers }}"
 - name: Stop mailu containers 
-  command: "docker stop {{ docker_containers|split(' ') }}"
+  command: "docker stop {{ docker_containers|join(' ') }}"
   become: true
   ignore_errors: true
   
\ No newline at end of file