diff --git a/deploy/deploy.sh b/deploy/deploy.sh
index c1646fe..9c3920c 100755
--- a/deploy/deploy.sh
+++ b/deploy/deploy.sh
@@ -11,6 +11,10 @@ ssh "root@$HOST" '
   cd /opt/wizwar && npm install --no-audit --no-fund
   chown -R wizwar:wizwar /opt/wizwar
   cp /opt/wizwar/deploy/wizwar.service /etc/systemd/system/wizwar.service
+  # The backup script is cron-run from /usr/local/bin — install it every
+  # deploy, or the repo copy and the live copy drift apart (they did:
+  # the Sentry check-ins shipped in the repo and never reached the box).
+  install -m 755 /opt/wizwar/deploy/wizwar-backup.sh /usr/local/bin/wizwar-backup.sh
   systemctl daemon-reload
   systemctl enable --now wizwar
   systemctl restart wizwar