diff --git a/roles/shelly_firmware/tasks/main.yml b/roles/shelly_firmware/tasks/main.yml
index 2d1dd3a..db0e0ea 100644
--- a/roles/shelly_firmware/tasks/main.yml
+++ b/roles/shelly_firmware/tasks/main.yml
@@ -8,7 +8,7 @@
   ansible.builtin.file:
     path: /srv/web/iot.foo.sh/shelly
     state: directory
-    mode: 0755
+    mode: "0755"
     owner: root
     group: "{{ ansible_wheel }}"
 
@@ -16,7 +16,7 @@
   ansible.builtin.copy:
     dest: /usr/local/bin/download-shelly-firmware
     src: download-shelly-firmware.sh
-    mode: 0755
+    mode: "0755"
     owner: root
     group: "{{ ansible_wheel }}"