diff --git a/docker/rootfs/etc/letsencrypt.ini b/docker/rootfs/etc/letsencrypt.ini
index 25c375e8..ccb2f0b3 100644
--- a/docker/rootfs/etc/letsencrypt.ini
+++ b/docker/rootfs/etc/letsencrypt.ini
@@ -1,3 +1,5 @@
 text = True
 non-interactive = True
 webroot-path = /data/letsencrypt-acme-challenge
+key-type = ecdsa
+elliptic-curve = secp384r1