diff --git a/image/rootfs/etc/hydra/update.pub b/image/rootfs/etc/hydra/update.pub
new file mode 100644
index 0000000..729a08e
--- /dev/null
+++ b/image/rootfs/etc/hydra/update.pub
@@ -0,0 +1,3 @@
+-----BEGIN PUBLIC KEY-----
+MCowBQYDK2VwAyEAv7478NwuD7binWXyVcaWCIo9o+ahNThjNjMRot+k5w0=
+-----END PUBLIC KEY-----