diff --git a/flutter/example/pubspec.yaml b/flutter/example/pubspec.yaml
index 2dbbb1b..3891eef 100644
--- a/flutter/example/pubspec.yaml
+++ b/flutter/example/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=3.4.0 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependency_overrides:
   qiniu_sdk_base:
@@ -13,7 +13,7 @@ dependency_overrides:
 dependencies:
   flutter:
     sdk: flutter
-  file_picker: ^8.1.7
+  file_picker: ^8.0.7
   qiniu_flutter_sdk:
     path: ../