diff --git a/examples/stacked_bar/main.go b/examples/stacked_bar/main.go
index ef65ca2..07304bc 100644
--- a/examples/stacked_bar/main.go
+++ b/examples/stacked_bar/main.go
@@ -10,6 +10,7 @@ import (
 
 func drawChart(res http.ResponseWriter, req *http.Request) {
 	sbc := chart.StackedBarChart{
+		Height: 512,
 		XAxis: chart.Style{
 			Show: true,
 		},
@@ -48,8 +49,8 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
 		},
 	}
 
-	res.Header().Set("Content-Type", "image/svg+xml")
-	err := sbc.Render(chart.SVG, res)
+	res.Header().Set("Content-Type", "image/png")
+	err := sbc.Render(chart.PNG, res)
 	if err != nil {
 		fmt.Printf("Error rendering chart: %v\n", err)
 	}
diff --git a/images/stacked_bar.png b/images/stacked_bar.png
new file mode 100644
index 0000000..4b0e9ae
Binary files /dev/null and b/images/stacked_bar.png differ
diff --git a/tick_test.go b/tick_test.go
index ed04595..e1fd2f4 100644
--- a/tick_test.go
+++ b/tick_test.go
@@ -9,6 +9,6 @@ import (
 func TestGenerateTicksWithStep(t *testing.T) {
 	assert := assert.New(t)
 
-	ticks := GenerateContinuousTicksWithStep(&ContinuousRange{Min: 1.0, Max: 10.0, Domain: 100}, 1.0, FloatValueFormatter)
+	ticks := GenerateContinuousTicksWithStep(&ContinuousRange{Min: 1.0, Max: 10.0, Domain: 100}, 1.0, FloatValueFormatter, false)
 	assert.Len(ticks, 10)
 }
diff --git a/yaxis_test.go b/yaxis_test.go
index 1941df5..7415b5c 100644
--- a/yaxis_test.go
+++ b/yaxis_test.go
@@ -23,7 +23,7 @@ func TestYAxisGetTicks(t *testing.T) {
 	}
 	vf := FloatValueFormatter
 	ticks := ya.GetTicks(r, yr, styleDefaults, vf)
-	assert.Len(ticks, 35)
+	assert.Len(ticks, 36)
 }
 
 func TestYAxisGetTicksWithUserDefaults(t *testing.T) {