diff --git a/telebot/types.py b/telebot/types.py
index be0274c..977382f 100644
--- a/telebot/types.py
+++ b/telebot/types.py
@@ -1933,6 +1933,7 @@ class ShippingOption(JsonSerializable):
         """
         for price in args:
             self.prices.append(price)
+        return self
 
     def to_json(self):
         price_list = []