diff --git a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/MainButton.kt b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/MainButton.kt
index 984d3221e0..502879a4b9 100644
--- a/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/MainButton.kt
+++ b/tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/MainButton.kt
@@ -36,6 +36,7 @@ data class MainButtonParams(
     val isVisible: Boolean? = null
 )
 
+@Deprecated(message="Use onClick without EventHandler")
 fun MainButton.onClick(eventHandler: EventHandler) = onClick {
     val that = js("this").unsafeCast<WebApp>()
     that.eventHandler()