diff --git a/macos/Classes/MethodHandler.swift b/macos/Classes/MethodHandler.swift
index 1d65462..1a5e698 100644
--- a/macos/Classes/MethodHandler.swift
+++ b/macos/Classes/MethodHandler.swift
@@ -86,6 +86,7 @@ public class InAppWebViewMacosMethodHandler: FlutterMethodCallDelegate {
   }
 
   public func dispose() {
+      controller?.dispose()
       controller = nil
   }