diff --git a/roles/docker/tasks/services.yml b/roles/docker/tasks/services.yml
index 488b1de..676335c 100644
--- a/roles/docker/tasks/services.yml
+++ b/roles/docker/tasks/services.yml
@@ -18,7 +18,7 @@
   include_tasks:
     file: block.yml
   vars:
-    service: "{{ {single_service: services[single_service]} | dict2items(key_name='name', value_name='vars') }}"
+    service: "{{ {single_service: services[single_service]} | dict2items(key_name='name', value_name='vars') | join }}"
   when: single_service is defined and single_service in services and
         (services[single_service].disabled_in_vagrant is not defined or
         not (services[single_service].disabled_in_vagrant and vagrant))