diff --git a/widgets/sparkline.go b/widgets/sparkline.go
index 840a8a7..ec963b5 100644
--- a/widgets/sparkline.go
+++ b/widgets/sparkline.go
@@ -17,7 +17,7 @@ type Sparkline struct {
 	TitleStyle Style
 	LineColor  Color
 	MaxVal     float64
-	MaxHeight  int // TODO
+	MaxHeight  int
 }
 
 // SparklineGroup is a renderable widget which groups together the given sparklines.
@@ -66,6 +66,9 @@ func (self *SparklineGroup) Draw(buf *Buffer) {
 		for j := 0; j < len(sl.Data) && j < self.Inner.Dx(); j++ {
 			data := sl.Data[j]
 			height := int((data / maxVal) * float64(barHeight))
+			if height > sl.MaxHeight {
+				height = sl.MaxHeight
+			}
 			sparkChar := BARS[len(BARS)-1]
 			for k := 0; k < height; k++ {
 				buf.SetCell(