diff --git a/lib/src/animated_circular_chart.dart b/lib/src/animated_circular_chart.dart
index acaab03..7679d40 100644
--- a/lib/src/animated_circular_chart.dart
+++ b/lib/src/animated_circular_chart.dart
@@ -26,7 +26,8 @@ class AnimatedCircularChart extends StatefulWidget {
     this.startAngle = _kStartAngle,
     this.holeLabel,
     this.labelStyle,
-  })  : assert(size != null),
+  })
+      : assert(size != null),
         super(key: key);
 
   /// The size of the bounding box this chart will be constrained to.
@@ -201,10 +202,10 @@ class AnimatedCircularChartState extends State<AnimatedCircularChart>
 
   void _updateLabelPainter() {
     if (widget.holeLabel != null) {
-      TextStyle _labelStyle = widget.labelStyle ?? Theme.of(context).textTheme.body2;
+      TextStyle _labelStyle =
+          widget.labelStyle ?? Theme.of(context).textTheme.body2;
       _labelPainter
-        ..text = new TextSpan(
-            style: _labelStyle, text: widget.holeLabel)
+        ..text = new TextSpan(style: _labelStyle, text: widget.holeLabel)
         ..textDirection = Directionality.of(context)
         ..textScaleFactor = MediaQuery.of(context).textScaleFactor
         ..layout();
diff --git a/lib/src/circular_chart.dart b/lib/src/circular_chart.dart
index 7243e63..a340112 100644
--- a/lib/src/circular_chart.dart
+++ b/lib/src/circular_chart.dart
@@ -11,13 +11,13 @@ class CircularChart {
 
   CircularChart(this.stacks, this.chartType);
 
+  final List<CircularChartStack> stacks;
+  final CircularChartType chartType;
+
   factory CircularChart.empty({@required CircularChartType chartType}) {
     return new CircularChart(<CircularChartStack>[], chartType);
   }
 
-  final List<CircularChartStack> stacks;
-  final CircularChartType chartType;
-
   factory CircularChart.fromData({
     @required Size size,
     @required List<CircularStackEntry> data,
@@ -60,6 +60,8 @@ class CircularChartTween extends Tween<CircularChart> {
   final MergeTween<CircularChartStack> _stacksTween;
 
   @override
-  CircularChart lerp(double t) =>
-      new CircularChart(_stacksTween.lerp(t), begin.chartType);
+  CircularChart lerp(double t) => new CircularChart(
+        _stacksTween.lerp(t),
+        begin.chartType,
+      );
 }
diff --git a/lib/src/stack.dart b/lib/src/stack.dart
index 627eb85..70b6757 100644
--- a/lib/src/stack.dart
+++ b/lib/src/stack.dart
@@ -9,7 +9,12 @@ const double _kMaxAngle = 360.0;
 
 class CircularChartStack implements MergeTweenable<CircularChartStack> {
   CircularChartStack(
-      this.rank, this.radius, this.width, this.startAngle, this.segments);
+    this.rank,
+    this.radius,
+    this.width,
+    this.startAngle,
+    this.segments,
+  );
 
   final int rank;
   final double radius;
@@ -30,8 +35,8 @@ class CircularChartStack implements MergeTweenable<CircularChartStack> {
         ? 100.0
         : entries.fold(
             0.0,
-            (double prev, CircularSegmentEntry element) =>
-                prev + element.value);
+            (double prev, CircularSegmentEntry element) => prev + element.value,
+          );
 
     double previousSweepAngle = 0.0;
     List<CircularChartSegment> segments =