diff --git a/stacked_bar_chart.go b/stacked_bar_chart.go
index cbf093e..b719e0c 100644
--- a/stacked_bar_chart.go
+++ b/stacked_bar_chart.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"math"
 
 	"github.com/golang/freetype/truetype"
 )
@@ -138,8 +139,8 @@ func (sbc StackedBarChart) drawBar(r Renderer, canvasBox Box, xoffset int, bar S
 	normalizedBarComponents := Values(bar.Values).Normalize()
 	yoffset := canvasBox.Top
 	for index, bv := range normalizedBarComponents {
-		barHeight := int(bv.Value * float64(canvasBox.Height()))
-		barBox := Box{Top: yoffset, Left: bxl, Right: bxr, Bottom: yoffset + barHeight}
+		barHeight := int(math.Ceil(bv.Value * float64(canvasBox.Height())))
+		barBox := Box{Top: yoffset, Left: bxl, Right: bxr, Bottom: Math.MinInt(yoffset+barHeight, canvasBox.Bottom-DefaultStrokeWidth)}
 		Draw.Box(r, barBox, bv.Style.InheritFrom(sbc.styleDefaultsStackedBarValue(index)))
 		yoffset += barHeight
 	}