diff --git a/infrastructure/server-setup/backups.yml b/infrastructure/server-setup/backups.yml
index 291b3f41c..6adbdc9a2 100644
--- a/infrastructure/server-setup/backups.yml
+++ b/infrastructure/server-setup/backups.yml
@@ -59,7 +59,7 @@
         - backups
 
     - name: Create public key file from private key
-      command: ssh-keygen -y -f {{ crontab_user_home }}/.ssh/id_rsa > {{ crontab_user_home }}/.ssh/id_rsa.pub
+      shell: ssh-keygen -y -f '{{ crontab_user_home }}/.ssh/id_rsa' > '{{ crontab_user_home }}/.ssh/id_rsa.pub'
       tags:
         - backups