diff --git a/roles/xmpp_server/molecule/default/prepare.yml b/roles/xmpp_server/molecule/default/prepare.yml
index 3565f16c730c0e26cf1ff9e6ab1ec3af786b59e8..2812c9662ec7594f387b3ebe317f216fe175c96a 100644
--- a/roles/xmpp_server/molecule/default/prepare.yml
+++ b/roles/xmpp_server/molecule/default/prepare.yml
@@ -94,7 +94,7 @@
           CipherString = DEFAULT@SECLEVEL=0
         owner: root
         group: root
-        mode: 0644
+        mode: "0644"
         state: present
 
     - name: Set-up the hosts file
@@ -104,7 +104,7 @@
         line: "{{ item.key }} {{ item.value }}"
         owner: root
         group: root
-        mode: 0644
+        mode: "0644"
         state: present
       with_dict:
         192.168.56.11: "ldap-server backup-server"
@@ -128,7 +128,7 @@
         dest: /usr/local/share/ca-certificates/testca.crt
         owner: root
         group: root
-        mode: 0644
+        mode: "0644"
       notify:
         - Update CA certificate cache
 
@@ -159,7 +159,7 @@
         dest: "~user/{{ item.jid }}.cfg"
         owner: user
         group: user
-        mode: 0600
+        mode: "0600"
       with_items:
         - jid: john.doe@domain1
           password: johnpassword
@@ -280,4 +280,4 @@
         dest: "/usr/local/bin/list_prosody_modules.lua"
         owner: root
         group: root
-        mode: 0755
+        mode: "0755"