diff --git a/pubspec.yaml b/pubspec.yaml
index 28d88283..2c555e65 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,11 @@
 name: pull_to_refresh
 description: a widget provided to the flutter scroll component drop-down refresh and pull up load.
-version: 1.6.4
+version: 1.6.5
 homepage: https://github.com/peng8350/flutter_pulltorefresh
 
 environment:
   sdk: ">=2.10.0 <3.0.0"
-  flutter: ">=0.1.4 <2.0.0"
+  flutter: ">=2.0.0"
 
 dependencies:
   flutter: