diff --git a/roles/ldap_server/molecule/default/prepare.yml b/roles/ldap_server/molecule/default/prepare.yml
index f39aa74bc1ae8d161c37032696a92716e05b7f75..a55be1d1c533968da81c2bc5f5c2c8460b825d5d 100644
--- a/roles/ldap_server/molecule/default/prepare.yml
+++ b/roles/ldap_server/molecule/default/prepare.yml
@@ -55,7 +55,7 @@
         dest: /etc/ssl/certs/testca.cert.pem
         owner: root
         group: root
-        mode: 0644
+        mode: "0644"
 
     - name: Remove the ss utility (see https://github.com/philpep/testinfra/pull/320)
       file:
@@ -87,7 +87,7 @@
         line: "{{ item.key }} {{ item.value }}"
         owner: root
         group: root
-        mode: 0644
+        mode: "0644"
         state: present
       with_dict:
         192.168.56.21: parameters-mandatory-bookworm
@@ -105,7 +105,7 @@
         line: "{{ item.key }} {{ item.value }}"
         owner: root
         group: root
-        mode: 0644
+        mode: "0644"
         state: present
       with_dict:
         127.0.2.1: parameters-optional
@@ -122,7 +122,7 @@
         line: "{{ item.key }} {{ item.value }}"
         owner: root
         group: root
-        mode: 0644
+        mode: "0644"
         state: present
       with_dict:
         127.0.2.1: parameters-mandatory