diff --git a/src/jsMain/kotlin/dev/inmo/jsuikit/types/Dropdown.kt b/src/jsMain/kotlin/dev/inmo/jsuikit/types/Dropdown.kt
index 7c9a536..bac466c 100644
--- a/src/jsMain/kotlin/dev/inmo/jsuikit/types/Dropdown.kt
+++ b/src/jsMain/kotlin/dev/inmo/jsuikit/types/Dropdown.kt
@@ -6,7 +6,7 @@ import dev.inmo.jsuikit.utils.*
 
 external interface Dropdown {
     fun show()
-    fun hide(delay: Boolean? = definedExternally)
+    fun hide(delay: Boolean = definedExternally)
     fun hide(delay: Milliseconds)
 }