diff --git a/roles/backup_client/tasks/main.yml b/roles/backup_client/tasks/main.yml
index 0f2b21ba8756f233a8cf0b807758a46dd4e8208d..c09f302722240da8b39868b7f2fe68bce8bd935d 100644
--- a/roles/backup_client/tasks/main.yml
+++ b/roles/backup_client/tasks/main.yml
@@ -13,7 +13,7 @@
     state: directory
     owner: root
     group: root
-    mode: 0700
+    mode: "0700"
   with_items:
     - "/etc/duply"
     - "/etc/duply/main"
@@ -29,7 +29,7 @@
     dest: "/etc/duply/main/private_keys.asc"
     owner: root
     group: root
-    mode: 0600
+    mode: "0600"
   notify:
     - Remove current keyring
     - Create keyring directory
@@ -42,7 +42,7 @@
     dest: "/etc/duply/main/public_keys.asc"
     owner: root
     group: root
-    mode: 0600
+    mode: "0600"
   notify:
     - Remove current keyring
     - Create keyring directory
@@ -74,7 +74,7 @@
     dest: "/etc/duply/main/ssh/identity"
     owner: root
     group: root
-    mode: 0600
+    mode: "0600"
   no_log: true
 
 - name: Deploy custom known_hosts for backup purposes
@@ -83,7 +83,7 @@
     dest: "/etc/duply/main/ssh/known_hosts"
     owner: root
     group: root
-    mode: 0600
+    mode: "0600"
 
 - name: Deploy Duply configuration file
   template:
@@ -91,7 +91,7 @@
     dest: "/etc/duply/main/conf"
     owner: root
     group: root
-    mode: 0600
+    mode: "0600"
 
 - name: Deploy base exclude pattern (exclude all by default)
   copy:
@@ -99,7 +99,7 @@
     dest: "/etc/duply/main/exclude"
     owner: root
     group: root
-    mode: 0600
+    mode: "0600"
 
 - name: Set-up directory for storing pre-backup scripts
   file:
@@ -107,7 +107,7 @@
     state: directory
     owner: root
     group: root
-    mode: 0700
+    mode: "0700"
 
 - name: Set-up script for running all pre-backup scripts
   copy:
@@ -115,7 +115,7 @@
     dest: "/etc/duply/main/pre"
     owner: root
     group: root
-    mode: 0700
+    mode: "0700"
 
 - name: Deploy crontab entry for running backups
   cron:
@@ -134,7 +134,7 @@
     force: false
     group: root
     owner: root
-    mode: 0600
+    mode: "0600"
 
 - name: Explicitly run all handlers
   include_tasks: ../handlers/main.yml