diff --git a/src/server.js b/src/server.js
index 20c079a9..e910ea26 100644
--- a/src/server.js
+++ b/src/server.js
@@ -113,6 +113,10 @@ const server = program => {
         return
       }
 
+      if (typeof deviceId !== 'string' || !deviceId) {
+        // TODO
+      }
+
       const authorized = ECC.isAuthorizedDevice({
         deviceId
       })