diff --git a/pyrogram/client/methods/messages/send_photo.py b/pyrogram/client/methods/messages/send_photo.py
index 8693f764..f5a5e6e0 100644
--- a/pyrogram/client/methods/messages/send_photo.py
+++ b/pyrogram/client/methods/messages/send_photo.py
@@ -64,7 +64,7 @@ class SendPhoto(BaseClient):
                 A valid file reference obtained by a recently fetched media message.
                 To be used in combination with a file id in case a file reference is needed.
 
-            caption (``bool``, *optional*):
+            caption (``str``, *optional*):
                 Photo caption, 0-1024 characters.
 
             parse_mode (``str``, *optional*):