diff --git a/server/router/account/index.js b/server/router/account/index.js
index 6b9fd83..ad87f55 100644
--- a/server/router/account/index.js
+++ b/server/router/account/index.js
@@ -51,7 +51,7 @@ module.exports = function (options) {
                         // TODO: Support multiple login options...
                         const loginMessage = {
                             action: "authenticate",
-                            responseEndpoint: `http://${config.get("server.domain")}/xpub-auth/sign`,
+                            responseEndpoint: `https://${config.get("server.domain")}/xpub-auth/sign`,
                             url: config.get("server.domain"),
                             userIdentifier: user.displayName,
                         }
@@ -233,7 +233,7 @@ module.exports = function (options) {
                         // Challenge
                         const registerationMessage = {
                             action: "register",
-                            responseEndpoint: `http://${config.get("server.domain")}/xpub-auth/sign`,
+                            responseEndpoint: `https://${config.get("server.domain")}/xpub-auth/sign`,
                             serviceExtendedPublicKey: config.get("bip32.serviceAuthenticatingExtendedPublicKey"),
                             url: config.get("server.domain"),
                             userIdentifier: xpubUser.displayName, // identifier the user supplies on the login page