diff --git a/coreos-config/templates/backup.sh.j2 b/coreos-config/templates/backup.sh.j2
index f85e8b5..ce22ccc 100755
--- a/coreos-config/templates/backup.sh.j2
+++ b/coreos-config/templates/backup.sh.j2
@@ -57,10 +57,10 @@ global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))
 
 if [ ${global_exit} -eq 0 ]; then
     info "Backup and Prune finished successfully"
-    /usr/bin/curl -fsS -m 10 --retry 5 -o /dev/null https://monitor.chaoswg.org/api/push/${PUSH_KEY}?msg=OK&ping=
+    /usr/bin/curl -fsS -m 10 --retry 5 -o /dev/null "https://monitor.chaoswg.org/api/push/${PUSH_KEY}?msg=OK&ping="
 elif [ ${global_exit} -eq 1 ]; then
     info "Backup and/or Prune finished with warnings"
-    /usr/bin/curl -fsS -m 10 --retry 5 -o /dev/null https://monitor.chaoswg.org/api/push/${PUSH_KEY}?msg=OK&ping=
+    /usr/bin/curl -fsS -m 10 --retry 5 -o /dev/null "https://monitor.chaoswg.org/api/push/${PUSH_KEY}?msg=OK&ping="
 else
     info "Backup and/or Prune finished with errors"
 fi