diff --git a/validate/device.schema.js b/validate/device.schema.js
index 4b3f945..e5e3369 100644
--- a/validate/device.schema.js
+++ b/validate/device.schema.js
@@ -16,7 +16,9 @@ const insertDeviceSchema = Joi.object({
         .messages({
             'string.ip': 'IP address must be a valid IPv4 or IPv6 address'
         }),
-    listen_channel: Joi.string().max(100).required()
+    listen_channel: Joi.string().max(100).required(),
+    listen_channel_reminder: Joi.string().max(100).optional(),
+    reminder_at: Joi.date().iso().allow(null).optional()
 });
 
 const updateDeviceSchema = Joi.object({
@@ -30,7 +32,10 @@ const updateDeviceSchema = Joi.object({
         .messages({
             'string.ip': 'IP address must be a valid IPv4 or IPv6 address'
         }),
-    listen_channel: Joi.string().max(100)
+    listen_channel: Joi.string().max(100),
+    listen_channel_reminder: Joi.string().max(100).optional(),
+    reminder_at: Joi.date().iso().allow(null).optional()
+
 }).min(1);