diff --git a/roles/mailman3/tasks/main.yml b/roles/mailman3/tasks/main.yml
index e01210b062..13246bcc33 100644
--- a/roles/mailman3/tasks/main.yml
+++ b/roles/mailman3/tasks/main.yml
@@ -396,7 +396,7 @@
 
 - name: Install the scripts
   ansible.builtin.copy:
-    src: {{item}}
+    src: "{{ item }}"
     dest: "{{ mailman_webui_basedir }}/bin/{{ item }}"
     owner: root
     group: root