diff --git a/src/public/javascripts/app.js b/src/public/javascripts/app.js
index 936fbb2..151453b 100644
--- a/src/public/javascripts/app.js
+++ b/src/public/javascripts/app.js
@@ -14,61 +14,62 @@ Chart.defaults.global.elements.line.borderColor = 'rgba(0,0,0,0.9)';
 Chart.defaults.global.elements.line.borderWidth = 2;
 
 var socket = io(location.protocol + '//' + location.hostname + ':' + (port || location.port), {
-  path: socketPath,
+    path: socketPath,
+    transports: ["websocket"]
 });
 var defaultSpan = 0;
 var spans = [];
 var statusCodesColors = ['#75D701', '#47b8e0', '#ffc952', '#E53A40'];
 
 var defaultDataset = {
-  label: '',
-  data: [],
-  lineTension: 0.2,
-  pointRadius: 0,
+    label: '',
+    data: [],
+    lineTension: 0.2,
+    pointRadius: 0,
 };
 
 var defaultOptions = {
-  scales: {
-    yAxes: [
-      {
-        ticks: {
-          beginAtZero: true,
-        },
-      },
-    ],
-    xAxes: [
-      {
-        type: 'time',
-        time: {
-          unitStepSize: 30,
-        },
-        gridLines: {
-          display: false,
-        },
-      },
-    ],
-  },
-  tooltips: {
-    enabled: false,
-  },
-  responsive: true,
-  maintainAspectRatio: false,
-  animation: false,
+    scales: {
+        yAxes: [
+            {
+                ticks: {
+                    beginAtZero: true,
+                },
+            },
+        ],
+        xAxes: [
+            {
+                type: 'time',
+                time: {
+                    unitStepSize: 30,
+                },
+                gridLines: {
+                    display: false,
+                },
+            },
+        ],
+    },
+    tooltips: {
+        enabled: false,
+    },
+    responsive: true,
+    maintainAspectRatio: false,
+    animation: false,
 };
 
 var createChart = function (ctx, dataset) {
-  return new Chart(ctx, {
-    type: 'line',
-    data: {
-      labels: [],
-      datasets: dataset,
-    },
-    options: defaultOptions,
-  });
+    return new Chart(ctx, {
+        type: 'line',
+        data: {
+            labels: [],
+            datasets: dataset,
+        },
+        options: defaultOptions,
+    });
 };
 
 var addTimestamp = function (point) {
-  return point.timestamp;
+    return point.timestamp;
 };
 
 var cpuDataset = [Object.create(defaultDataset)];
@@ -104,232 +105,232 @@ var loadChart = createChart(loadChartCtx, loadDataset);
 var responseTimeChart = createChart(responseTimeChartCtx, responseTimeDataset);
 var rpsChart = createChart(rpsChartCtx, rpsDataset);
 var statusCodesChart = new Chart(statusCodesChartCtx, {
-  type: 'line',
-  data: {
-    labels: [],
-    datasets: [
-      Object.create(defaultDataset),
-      Object.create(defaultDataset),
-      Object.create(defaultDataset),
-      Object.create(defaultDataset),
-    ],
-  },
-  options: defaultOptions,
+    type: 'line',
+    data: {
+        labels: [],
+        datasets: [
+            Object.create(defaultDataset),
+            Object.create(defaultDataset),
+            Object.create(defaultDataset),
+            Object.create(defaultDataset),
+        ],
+    },
+    options: defaultOptions,
 });
 
 statusCodesChart.data.datasets.forEach(function (dataset, index) {
-  dataset.borderColor = statusCodesColors[index];
+    dataset.borderColor = statusCodesColors[index];
 });
 
 var charts = [
-  cpuChart,
-  memChart,
-  loadChart,
-  responseTimeChart,
-  rpsChart,
-  statusCodesChart,
-  heapChart,
-  eventLoopChart,
+    cpuChart,
+    memChart,
+    loadChart,
+    responseTimeChart,
+    rpsChart,
+    statusCodesChart,
+    heapChart,
+    eventLoopChart,
 ];
 
 var onSpanChange = function (e) {
-  e.target.classList.add('active');
-  defaultSpan = parseInt(e.target.id, 10);
+    e.target.classList.add('active');
+    defaultSpan = parseInt(e.target.id, 10);
 
-  var otherSpans = document.getElementsByTagName('span');
+    var otherSpans = document.getElementsByTagName('span');
 
-  for (var i = 0; i < otherSpans.length; i++) {
-    if (otherSpans[i] !== e.target) otherSpans[i].classList.remove('active');
-  }
+    for (var i = 0; i < otherSpans.length; i++) {
+        if (otherSpans[i] !== e.target) otherSpans[i].classList.remove('active');
+    }
 
-  socket.emit('esm_change');
+    socket.emit('esm_change');
 };
 
 socket.on('esm_start', function (data) {
-  // Remove last element of Array because it contains malformed responses data.
-  // To keep consistency we also remove os data.
-  data[defaultSpan].responses.pop();
-  data[defaultSpan].os.pop();
-
-  var lastOsMetric = data[defaultSpan].os[data[defaultSpan].os.length - 1];
-
-  cpuStat.textContent = '0.0%';
-  if (lastOsMetric) {
-    cpuStat.textContent = lastOsMetric.cpu.toFixed(1) + '%';
-  }
-
-  cpuChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
-    return point.cpu;
-  });
-  cpuChart.data.labels = data[defaultSpan].os.map(addTimestamp);
-
-  memStat.textContent = '0.0MB';
-  if (lastOsMetric) {
-    memStat.textContent = lastOsMetric.memory.toFixed(1) + 'MB';
-  }
-
-  memChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
-    return point.memory;
-  });
-  memChart.data.labels = data[defaultSpan].os.map(addTimestamp);
-
-  loadStat.textContent = '0.00';
-  if (lastOsMetric) {
-    loadStat.textContent = lastOsMetric.load[defaultSpan].toFixed(2);
-  }
-
-  loadChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
-    return point.load[0];
-  });
-  loadChart.data.labels = data[defaultSpan].os.map(addTimestamp);
-
-  heapChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
-    return point.heap.used_heap_size / 1024 / 1024;
-  });
-  heapChart.data.labels = data[defaultSpan].os.map(addTimestamp);
-
-  eventLoopChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
-    if (point.loop) {
-      return point.loop.sum;
-    }
-    return 0;
-  });
-  eventLoopChart.data.labels = data[defaultSpan].os.map(addTimestamp);
-
-  var lastResponseMetric = data[defaultSpan].responses[data[defaultSpan].responses.length - 1];
+    // Remove last element of Array because it contains malformed responses data.
+    // To keep consistency we also remove os data.
+    data[defaultSpan].responses.pop();
+    data[defaultSpan].os.pop();
 
-  responseTimeStat.textContent = '0.00ms';
-  if (lastResponseMetric) {
-    responseTimeStat.textContent = lastResponseMetric.mean.toFixed(2) + 'ms';
-  }
+    var lastOsMetric = data[defaultSpan].os[data[defaultSpan].os.length - 1];
 
-  responseTimeChart.data.datasets[0].data = data[defaultSpan].responses.map(function (point) {
-    return point.mean;
-  });
-  responseTimeChart.data.labels = data[defaultSpan].responses.map(addTimestamp);
+    cpuStat.textContent = '0.0%';
+    if (lastOsMetric) {
+        cpuStat.textContent = lastOsMetric.cpu.toFixed(1) + '%';
+    }
 
-  for (var i = 0; i < 4; i++) {
-    statusCodesChart.data.datasets[i].data = data[defaultSpan].responses.map(function (point) {
-      return point[i + 2];
-    });
-  }
-  statusCodesChart.data.labels = data[defaultSpan].responses.map(addTimestamp);
-
-  if (data[defaultSpan].responses.length >= 2) {
-    var deltaTime =
-      lastResponseMetric.timestamp -
-      data[defaultSpan].responses[data[defaultSpan].responses.length - 2].timestamp;
-
-    if (deltaTime < 1) deltaTime = 1000;
-    rpsStat.textContent = ((lastResponseMetric.count / deltaTime) * 1000).toFixed(2);
-    rpsChart.data.datasets[0].data = data[defaultSpan].responses.map(function (point) {
-      return (point.count / deltaTime) * 1000;
+    cpuChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
+        return point.cpu;
     });
-    rpsChart.data.labels = data[defaultSpan].responses.map(addTimestamp);
-  }
+    cpuChart.data.labels = data[defaultSpan].os.map(addTimestamp);
 
-  charts.forEach(function (chart) {
-    chart.update();
-  });
+    memStat.textContent = '0.0MB';
+    if (lastOsMetric) {
+        memStat.textContent = lastOsMetric.memory.toFixed(1) + 'MB';
+    }
 
-  var spanControls = document.getElementById('span-controls');
+    memChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
+        return point.memory;
+    });
+    memChart.data.labels = data[defaultSpan].os.map(addTimestamp);
 
-  if (data.length !== spans.length) {
-    data.forEach(function (span, index) {
-      spans.push({
-        retention: span.retention,
-        interval: span.interval,
-      });
+    loadStat.textContent = '0.00';
+    if (lastOsMetric) {
+        loadStat.textContent = lastOsMetric.load[defaultSpan].toFixed(2);
+    }
 
-      var spanNode = document.createElement('span');
-      var textNode = document.createTextNode((span.retention * span.interval) / 60 + 'M'); // eslint-disable-line
+    loadChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
+        return point.load[0];
+    });
+    loadChart.data.labels = data[defaultSpan].os.map(addTimestamp);
 
-      spanNode.appendChild(textNode);
-      spanNode.setAttribute('id', index);
-      spanNode.onclick = onSpanChange;
-      spanControls.appendChild(spanNode);
+    heapChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
+        return point.heap.used_heap_size / 1024 / 1024;
     });
-    document.getElementsByTagName('span')[0].classList.add('active');
-  }
-});
+    heapChart.data.labels = data[defaultSpan].os.map(addTimestamp);
 
-socket.on('esm_stats', function (data) {
-  console.log(data);
+    eventLoopChart.data.datasets[0].data = data[defaultSpan].os.map(function (point) {
+        if (point.loop) {
+            return point.loop.sum;
+        }
+        return 0;
+    });
+    eventLoopChart.data.labels = data[defaultSpan].os.map(addTimestamp);
 
-  if (
-    data.retention === spans[defaultSpan].retention &&
-    data.interval === spans[defaultSpan].interval
-  ) {
-    var os = data.os;
-    var responses = data.responses;
+    var lastResponseMetric = data[defaultSpan].responses[data[defaultSpan].responses.length - 1];
 
-    cpuStat.textContent = '0.0%';
-    if (os) {
-      cpuStat.textContent = os.cpu.toFixed(1) + '%';
-      cpuChart.data.datasets[0].data.push(os.cpu);
-      cpuChart.data.labels.push(os.timestamp);
+    responseTimeStat.textContent = '0.00ms';
+    if (lastResponseMetric) {
+        responseTimeStat.textContent = lastResponseMetric.mean.toFixed(2) + 'ms';
     }
 
-    memStat.textContent = '0.0MB';
-    if (os) {
-      memStat.textContent = os.memory.toFixed(1) + 'MB';
-      memChart.data.datasets[0].data.push(os.memory);
-      memChart.data.labels.push(os.timestamp);
-    }
+    responseTimeChart.data.datasets[0].data = data[defaultSpan].responses.map(function (point) {
+        return point.mean;
+    });
+    responseTimeChart.data.labels = data[defaultSpan].responses.map(addTimestamp);
 
-    loadStat.textContent = '0';
-    if (os) {
-      loadStat.textContent = os.load[0].toFixed(2);
-      loadChart.data.datasets[0].data.push(os.load[0]);
-      loadChart.data.labels.push(os.timestamp);
+    for (var i = 0; i < 4; i++) {
+        statusCodesChart.data.datasets[i].data = data[defaultSpan].responses.map(function (point) {
+            return point[i + 2];
+        });
     }
+    statusCodesChart.data.labels = data[defaultSpan].responses.map(addTimestamp);
 
-    heapStat.textContent = '0';
-    if (os) {
-      heapStat.textContent = (os.heap.used_heap_size / 1024 / 1024).toFixed(1) + 'MB';
-      heapChart.data.datasets[0].data.push(os.heap.used_heap_size / 1024 / 1024);
-      heapChart.data.labels.push(os.timestamp);
-    }
+    if (data[defaultSpan].responses.length >= 2) {
+        var deltaTime =
+            lastResponseMetric.timestamp -
+            data[defaultSpan].responses[data[defaultSpan].responses.length - 2].timestamp;
 
-    eventLoopStat.textContent = '0';
-    if (os && os.loop) {
-      eventLoopStat.textContent = os.loop.sum.toFixed(2) + 'ms';
-      eventLoopChart.data.datasets[0].data.push(os.loop.sum);
-      eventLoopChart.data.labels.push(os.timestamp);
+        if (deltaTime < 1) deltaTime = 1000;
+        rpsStat.textContent = ((lastResponseMetric.count / deltaTime) * 1000).toFixed(2);
+        rpsChart.data.datasets[0].data = data[defaultSpan].responses.map(function (point) {
+            return (point.count / deltaTime) * 1000;
+        });
+        rpsChart.data.labels = data[defaultSpan].responses.map(addTimestamp);
     }
 
-    responseTimeStat.textContent = '0.00ms';
-    if (responses) {
-      responseTimeStat.textContent = responses.mean.toFixed(2) + 'ms';
-      responseTimeChart.data.datasets[0].data.push(responses.mean);
-      responseTimeChart.data.labels.push(responses.timestamp);
-    }
+    charts.forEach(function (chart) {
+        chart.update();
+    });
 
-    if (responses) {
-      var deltaTime = responses.timestamp - rpsChart.data.labels[rpsChart.data.labels.length - 1];
+    var spanControls = document.getElementById('span-controls');
 
-      if (deltaTime < 1) deltaTime = 1000;
-      rpsStat.textContent = ((responses.count / deltaTime) * 1000).toFixed(2);
-      rpsChart.data.datasets[0].data.push((responses.count / deltaTime) * 1000);
-      rpsChart.data.labels.push(responses.timestamp);
-    }
+    if (data.length !== spans.length) {
+        data.forEach(function (span, index) {
+            spans.push({
+                retention: span.retention,
+                interval: span.interval,
+            });
 
-    if (responses) {
-      for (var i = 0; i < 4; i++) {
-        statusCodesChart.data.datasets[i].data.push(data.responses[i + 2]);
-      }
-      statusCodesChart.data.labels.push(data.responses.timestamp);
-    }
+            var spanNode = document.createElement('span');
+            var textNode = document.createTextNode((span.retention * span.interval) / 60 + 'M'); // eslint-disable-line
 
-    charts.forEach(function (chart) {
-      if (spans[defaultSpan].retention < chart.data.labels.length) {
-        chart.data.datasets.forEach(function (dataset) {
-          dataset.data.shift();
+            spanNode.appendChild(textNode);
+            spanNode.setAttribute('id', index);
+            spanNode.onclick = onSpanChange;
+            spanControls.appendChild(spanNode);
         });
+        document.getElementsByTagName('span')[0].classList.add('active');
+    }
+});
 
-        chart.data.labels.shift();
-      }
-      chart.update();
-    });
-  }
+socket.on('esm_stats', function (data) {
+    console.log(data);
+
+    if (
+        data.retention === spans[defaultSpan].retention &&
+        data.interval === spans[defaultSpan].interval
+    ) {
+        var os = data.os;
+        var responses = data.responses;
+
+        cpuStat.textContent = '0.0%';
+        if (os) {
+            cpuStat.textContent = os.cpu.toFixed(1) + '%';
+            cpuChart.data.datasets[0].data.push(os.cpu);
+            cpuChart.data.labels.push(os.timestamp);
+        }
+
+        memStat.textContent = '0.0MB';
+        if (os) {
+            memStat.textContent = os.memory.toFixed(1) + 'MB';
+            memChart.data.datasets[0].data.push(os.memory);
+            memChart.data.labels.push(os.timestamp);
+        }
+
+        loadStat.textContent = '0';
+        if (os) {
+            loadStat.textContent = os.load[0].toFixed(2);
+            loadChart.data.datasets[0].data.push(os.load[0]);
+            loadChart.data.labels.push(os.timestamp);
+        }
+
+        heapStat.textContent = '0';
+        if (os) {
+            heapStat.textContent = (os.heap.used_heap_size / 1024 / 1024).toFixed(1) + 'MB';
+            heapChart.data.datasets[0].data.push(os.heap.used_heap_size / 1024 / 1024);
+            heapChart.data.labels.push(os.timestamp);
+        }
+
+        eventLoopStat.textContent = '0';
+        if (os && os.loop) {
+            eventLoopStat.textContent = os.loop.sum.toFixed(2) + 'ms';
+            eventLoopChart.data.datasets[0].data.push(os.loop.sum);
+            eventLoopChart.data.labels.push(os.timestamp);
+        }
+
+        responseTimeStat.textContent = '0.00ms';
+        if (responses) {
+            responseTimeStat.textContent = responses.mean.toFixed(2) + 'ms';
+            responseTimeChart.data.datasets[0].data.push(responses.mean);
+            responseTimeChart.data.labels.push(responses.timestamp);
+        }
+
+        if (responses) {
+            var deltaTime = responses.timestamp - rpsChart.data.labels[rpsChart.data.labels.length - 1];
+
+            if (deltaTime < 1) deltaTime = 1000;
+            rpsStat.textContent = ((responses.count / deltaTime) * 1000).toFixed(2);
+            rpsChart.data.datasets[0].data.push((responses.count / deltaTime) * 1000);
+            rpsChart.data.labels.push(responses.timestamp);
+        }
+
+        if (responses) {
+            for (var i = 0; i < 4; i++) {
+                statusCodesChart.data.datasets[i].data.push(data.responses[i + 2]);
+            }
+            statusCodesChart.data.labels.push(data.responses.timestamp);
+        }
+
+        charts.forEach(function (chart) {
+            if (spans[defaultSpan].retention < chart.data.labels.length) {
+                chart.data.datasets.forEach(function (dataset) {
+                    dataset.data.shift();
+                });
+
+                chart.data.labels.shift();
+            }
+            chart.update();
+        });
+    }
 });