diff --git a/pytlu/online_monitor/pytlu_receiver.py b/pytlu/online_monitor/pytlu_receiver.py
index 5bdcc6e..a7c2fc4 100644
--- a/pytlu/online_monitor/pytlu_receiver.py
+++ b/pytlu/online_monitor/pytlu_receiver.py
@@ -1,14 +1,11 @@
 import time
 
-from PyQt5 import Qt
+from PyQt5 import QtWidgets
 import pyqtgraph as pg
-from pyqtgraph.Qt import QtGui
 from pyqtgraph.dockarea import DockArea, Dock
-import pyqtgraph.ptime as ptime
 
 from online_monitor.utils import utils
 from online_monitor.receiver.receiver import Receiver
-from zmq.utils import jsonapi
 
 
 class PyTLU(Receiver):
@@ -26,17 +23,17 @@ def setup_widgets(self, parent, name):
         dock_area.addDock(dock_status, 'top')
 
         # Status dock on top
-        cw = QtGui.QWidget()
+        cw = QtWidgets.QWidget()
         cw.setStyleSheet("QWidget {background-color:white}")
-        layout = QtGui.QGridLayout()
+        layout = QtWidgets.QGridLayout()
         cw.setLayout(layout)
-        self.rate_label = QtGui.QLabel("Readout Rate\n0 Hz")
-        self.timestamp_label = QtGui.QLabel("Data Timestamp\n")
-        self.plot_delay_label = QtGui.QLabel("Plot Delay\n")
-        self.spin_box = Qt.QSpinBox(value=0)
+        self.rate_label = QtWidgets.QLabel("Readout Rate\n0 Hz")
+        self.timestamp_label = QtWidgets.QLabel("Data Timestamp\n")
+        self.plot_delay_label = QtWidgets.QLabel("Plot Delay\n")
+        self.spin_box = QtWidgets.QSpinBox(value=0)
         self.spin_box.setMaximum(1000000)
         self.spin_box.setSuffix(" Readouts")
-        self.reset_button = QtGui.QPushButton('Reset')
+        self.reset_button = QtWidgets.QPushButton('Reset')
         layout.addWidget(self.timestamp_label, 0, 0, 0, 1)
         layout.addWidget(self.plot_delay_label, 0, 1, 0, 1)
         layout.addWidget(self.rate_label, 0, 2, 0, 1)
@@ -104,6 +101,6 @@ def handle_data_if_active(self, data):
         # set timestamp, plot delay and readour rate
         self.rate_label.setText("Readout Rate\n%d Hz" % data['fps'])
         self.timestamp_label.setText("Data Timestamp\n%s" % time.asctime(time.localtime(data['timestamp_stop'])))
-        now = ptime.time()
+        now = time.time()
         self.plot_delay = self.plot_delay * 0.9 + (now - data['timestamp_stop']) * 0.1
         self.plot_delay_label.setText("Plot Delay\n%s" % 'not realtime' if abs(self.plot_delay) > 5 else "%1.2f ms" % (self.plot_delay * 1.e3))