diff --git a/druid/annotations.lua b/druid/annotations.lua
index fc967b2..efd981f 100644
--- a/druid/annotations.lua
+++ b/druid/annotations.lua
@@ -1653,7 +1653,7 @@ function druid_instance.on_input(self, action_id, action) end
 ---@param self druid_instance
 ---@param message_id hash Message_id from on_message
 ---@param message table Message from on_message
----@param sender hash Sender from on_message
+---@param sender url Sender from on_message
 function druid_instance.on_message(self, message_id, message, sender) end
 
 --- Remove created component from Druid instance.
diff --git a/druid/system/druid_instance.lua b/druid/system/druid_instance.lua
index c16a2a4..02f875d 100755
--- a/druid/system/druid_instance.lua
+++ b/druid/system/druid_instance.lua
@@ -397,7 +397,7 @@ end
 -- @tparam DruidInstance self
 -- @tparam hash message_id Message_id from on_message
 -- @tparam table message Message from on_message
--- @tparam hash sender Sender from on_message
+-- @tparam url sender Sender from on_message
 function DruidInstance.on_message(self, message_id, message, sender)
 	local specific_ui_message = base_component.SPECIFIC_UI_MESSAGES[message_id]