Chartjs wrong automatic y-Axis scale - chart.js

Question

the automatic scaling of the y-axis does not seem to work properly. I have the following code:
<script>
$(function () {
var lineChartCanvas = $('#lineChart').get(0).getContext('2d')
var lineChartData = {
datasets: [
{
label: 'Digital Goods',
backgroundColor: 'rgba(60,141,188,0.9)',
borderColor: 'rgba(60,141,188,0.8)',
pointRadius: false,
pointColor: '#3b8bba',
pointStrokeColor: 'rgba(60,141,188,1)',
pointHighlightFill: '#ffffff',
pointHighlightStroke: 'rgba(60,141,188,1)',
data: {{data}}
},
]
}
var lineChartOptions = {
maintainAspectRatio: false,
responsive: true,
legend: {
display: false
},
scales: {
xAxes: [{
gridLines: {
display: false,
}
}],
yAxes: [{
gridLines: {
display: false,
}
}]
}
}
var lineChart = new Chart(lineChartCanvas, {
type: 'line',
data: lineChartData,
options: lineChartOptions
})
});
enter image description here
The graphs yaxes goes till 5, however, there is no data bigger than 1. I would like it to be more precise (y-axes not higher than 1 or something). However, as this code is part of a bigger application, I cannot set a fixed max as the code differs per scenario.
I tried to add an example, however, the data is not exactly like that (orginially 8760 values) and in this example another problem comes up. My lib is jquery.min.js (https://jsfiddle.net/742ovrLm/)