diff --git a/lib/spinner_input.dart b/lib/spinner_input.dart
index fa3e9ad..0ee5892 100644
--- a/lib/spinner_input.dart
+++ b/lib/spinner_input.dart
@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import 'dart:async';
 
-
 /// Spinner Input like HTML5 spinners
 class SpinnerButtonStyle {
   Color color;
@@ -80,7 +79,6 @@ class _SpinnerInputState extends State<SpinnerInput>
   final _focusNode = FocusNode();
 
   Timer timer;
-  double _spinnerValue;
 
   SpinnerButtonStyle _plusSpinnerStyle;
   SpinnerButtonStyle _minusSpinnerStyle;
@@ -88,10 +86,6 @@ class _SpinnerInputState extends State<SpinnerInput>
 
   @override
   void initState() {
-
-    /// initializing variables
-    _spinnerValue = widget.spinnerValue;
-
     /// popup textfield
     textEditingController = TextEditingController(
         text: widget.spinnerValue.toStringAsFixed(widget.fractionDigits));
@@ -108,7 +102,6 @@ class _SpinnerInputState extends State<SpinnerInput>
       }
     });
 
-
     // initialize buttons
     _plusSpinnerStyle = widget.plusButton ?? SpinnerButtonStyle();
     _plusSpinnerStyle.child ??= Icon(Icons.add);
@@ -257,11 +250,10 @@ class _SpinnerInputState extends State<SpinnerInput>
   }
 
   void increase() {
-    double value = _spinnerValue;
+    double value = widget.spinnerValue;
     value += widget.step;
     if (value <= widget.maxValue) {
       textEditingController.text = value.toStringAsFixed(widget.fractionDigits);
-      _spinnerValue = value;
       setState(() {
         widget.onChange(value);
       });
@@ -269,11 +261,10 @@ class _SpinnerInputState extends State<SpinnerInput>
   }
 
   void decrease() {
-    double value = _spinnerValue;
+    double value = widget.spinnerValue;
     value -= widget.step;
     if (value >= widget.minValue) {
       textEditingController.text = value.toStringAsFixed(widget.fractionDigits);
-      _spinnerValue = value;
       setState(() {
         widget.onChange(value);
       });
@@ -337,16 +328,15 @@ class _SpinnerInputState extends State<SpinnerInput>
                         double value = double.parse(textEditingController.text);
                         if (value <= widget.maxValue &&
                             value >= widget.minValue) {
-                          _spinnerValue = value;
                           setState(() {
                             widget.onChange(value);
                           });
                         } else {
-                          textEditingController.text = _spinnerValue
+                          textEditingController.text = widget.spinnerValue
                               .toStringAsFixed(widget.fractionDigits);
                         }
                       } catch (e) {
-                        textEditingController.text = _spinnerValue
+                        textEditingController.text = widget.spinnerValue
                             .toStringAsFixed(widget.fractionDigits);
                       }
                       popupAnimationController.reset();
diff --git a/pubspec.lock b/pubspec.lock
index 224c7bb..9477cdd 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   async:
     dependency: transitive
@@ -7,28 +7,49 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.4.2"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.2"
+    version: "1.1.3"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.11"
+    version: "1.14.13"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -45,28 +66,21 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.3+1"
+    version: "0.12.8"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.1.8"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.2"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.1"
+    version: "1.7.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -78,49 +92,49 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.1"
+    version: "1.7.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "1.9.5"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.8"
+    version: "2.0.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "1.0.5"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.1.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.1"
+    version: "0.2.17"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.2.0"
   vector_math:
     dependency: transitive
     description:
@@ -129,4 +143,4 @@ packages:
     source: hosted
     version: "2.0.8"
 sdks:
-  dart: ">=2.0.0 <3.0.0"
+  dart: ">=2.9.0-14.0.dev <3.0.0"