diff --git a/esphome/dashboard/dashboard.py b/esphome/dashboard/dashboard.py
index 14b06a3c82..4df7b5a386 100644
--- a/esphome/dashboard/dashboard.py
+++ b/esphome/dashboard/dashboard.py
@@ -169,7 +169,7 @@ def websocket_class(cls):
     if not hasattr(cls, '_message_handlers'):
         cls._message_handlers = {}
 
-    for _, method in cls.__dict__.iteritems():
+    for _, method in cls.__dict__.items():
         if hasattr(method, "_message_handler"):
             cls._message_handlers[method._message_handler] = method