diff --git a/CHANGELOG.md b/CHANGELOG.md
index fc42859d..c197a3be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.6.5
+* fix check full page logic.
+* fix crash "locking up a deactive widget is unsafe".
+
 ## 1.6.4
 * fix error crash by deprecated function removed 
 * add extra ScrollView reference parameter
diff --git a/README.md b/README.md
index a708d994..2e543760 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
   <img src="https://img.shields.io/pub/v/pull_to_refresh.svg"/>
 </a>
 <a href="https://flutter.dev/">
-  <img src="https://img.shields.io/badge/flutter-%3E%3D%201.2.1-green.svg"/>
+  <img src="https://img.shields.io/badge/flutter-%3E%3D%202.0.0-green.svg"/>
 </a>
 <a href="https://opensource.org/licenses/MIT">
   <img src="https://img.shields.io/badge/License-MIT-yellow.svg"/>
@@ -35,10 +35,10 @@ add this line to pubspec.yaml
 ```yaml
 
    dependencies:
-    # stable version
-    pull_to_refresh: 1.6.3 
-    # other version
-    # pull_to_refresh: ^1.6.4
+
+    pull_to_refresh: ^1.6.5
+    # null-safety version
+    # pull_to_refresh: 1.6.4-nullsafety.0 
 
 ```
 
diff --git a/README_CN.md b/README_CN.md
index 75cb3d37..67a5579a 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -3,7 +3,7 @@
   <img src="https://img.shields.io/pub/v/pull_to_refresh.svg"/>
 </a>
 <a href="https://flutter.dev/">
-  <img src="https://img.shields.io/badge/flutter-%3E%3D%201.2.1-green.svg"/>
+  <img src="https://img.shields.io/badge/flutter-%3E%3D%202.0.0-green.svg"/>
 </a>
 <a href="https://opensource.org/licenses/MIT">
   <img src="https://img.shields.io/badge/License-MIT-yellow.svg"/>
@@ -35,10 +35,10 @@
 ```yaml
 
    dependencies:
-    # stable version
-    pull_to_refresh: 1.6.3 
-    # other version
-    # pull_to_refresh: ^1.6.4
+
+    pull_to_refresh: ^1.6.5
+    # null-safety version
+    # pull_to_refresh: 1.6.4-nullsafety.0 
 
 ```
 
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 0b769d88..648cf626 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -13,7 +13,6 @@ class MyApp extends StatelessWidget {
   // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
-
     return RefreshConfiguration(
       footerTriggerDistance: 15,
       dragSpeedRatio: 0.91,
diff --git a/lib/src/indicator/material_indicator.dart b/lib/src/indicator/material_indicator.dart
index 792fd8a7..b499f374 100644
--- a/lib/src/indicator/material_indicator.dart
+++ b/lib/src/indicator/material_indicator.dart
@@ -77,8 +77,7 @@ class _MaterialClassicHeaderState
         duration: Duration(milliseconds: 500));
     _valueAni.addListener(() {
       // frequently setState will decline the performance
-      if (mounted && _position.pixels <= 0)
-        setState(() {});
+      if (mounted && _position.pixels <= 0) setState(() {});
     });
     _positionController =
         AnimationController(vsync: this, duration: Duration(milliseconds: 300));
@@ -100,8 +99,6 @@ class _MaterialClassicHeaderState
     super.didUpdateWidget(oldWidget);
   }
 
-
-
   @override
   Widget buildContent(BuildContext context, RefreshStatus mode) {
     // TODO: implement buildContent
diff --git a/lib/src/internals/indicator_wrap.dart b/lib/src/internals/indicator_wrap.dart
index 87b82119..6f6fbdf7 100644
--- a/lib/src/internals/indicator_wrap.dart
+++ b/lib/src/internals/indicator_wrap.dart
@@ -240,8 +240,7 @@ abstract class RefreshIndicatorState<T extends RefreshIndicator>
 
       resetValue();
 
-      if (mode == RefreshStatus.idle)
-        refresherState.setCanDrag(true);
+      if (mode == RefreshStatus.idle) refresherState.setCanDrag(true);
     }
     if (mode == RefreshStatus.completed || mode == RefreshStatus.failed) {
       endRefresh().then((_) {
@@ -305,8 +304,7 @@ abstract class RefreshIndicatorState<T extends RefreshIndicator>
       refresherState.setCanDrag(false);
       update();
     } else if (mode == RefreshStatus.twoLeveling) {
-      refresherState
-          .setCanDrag(configuration.enableScrollWhenTwoLevel);
+      refresherState.setCanDrag(configuration.enableScrollWhenTwoLevel);
     }
     onModeChange(mode);
   }
diff --git a/lib/src/internals/slivers.dart b/lib/src/internals/slivers.dart
index cf7c71ec..9dea5130 100644
--- a/lib/src/internals/slivers.dart
+++ b/lib/src/internals/slivers.dart
@@ -398,7 +398,7 @@ class RenderSliverLoading extends RenderSliverSingleBoxAdapter {
       sliverP = viewport.childAfter(sliverP);
     }
     // consider about footer layoutExtent,it should be subtracted it's height
-    return totalScrollExtent >= cons.viewportMainAxisExtent ;
+    return totalScrollExtent >= cons.viewportMainAxisExtent;
   }
 
   //  many sitiuation: 1. reverse 2. not reverse