diff --git a/README.md b/README.md
index d0579050..a1bfcf27 100644
--- a/README.md
+++ b/README.md
@@ -93,7 +93,7 @@ It is required to provide EmbedBuilder, e.g. [defaultEmbedBuilderWeb](https://gi
 
 ## Desktop
 
-It is required to provide application document directory for toolbar image button, e.g. [Sample Page](https://github.com/singerdmx/flutter-quill/blob/master/example/lib/pages/home_page.dart#L148).
+It is required to provide `filePickImpl` for toolbar image button, e.g. [Sample Page](https://github.com/singerdmx/flutter-quill/blob/master/example/lib/pages/home_page.dart#L149).
 
 ## Migrate Zefyr Data