diff --git a/dronecan_gui_tool/panels/esc_panel.py b/dronecan_gui_tool/panels/esc_panel.py
index 8907888..5056b99 100644
--- a/dronecan_gui_tool/panels/esc_panel.py
+++ b/dronecan_gui_tool/panels/esc_panel.py
@@ -314,11 +314,11 @@ def _do_broadcast(self):
                 sl.check_fps_timeout()
             if not self._view_mode.isChecked():
                 if not self._pause.isChecked():
-                    if self._safety_enable.checkState():
+                    if self._safety_enable.isChecked():
                         msg = dronecan.ardupilot.indication.SafetyState()
                         msg.status = msg.STATUS_SAFETY_OFF
                         self._node.broadcast(msg)
-                    if self._arming_enable.checkState():
+                    if self._arming_enable.isChecked():
                         msg = dronecan.uavcan.equipment.safety.ArmingStatus()
                         msg.status = msg.STATUS_FULLY_ARMED
                         self._node.broadcast(msg)
diff --git a/dronecan_gui_tool/panels/serial_panel.py b/dronecan_gui_tool/panels/serial_panel.py
index bf9c108..4a8c68a 100644
--- a/dronecan_gui_tool/panels/serial_panel.py
+++ b/dronecan_gui_tool/panels/serial_panel.py
@@ -486,7 +486,7 @@ def handle_ublox_message_out(self):
 
     def handle_ublox_data_out(self, buf):
         '''handle ublox data from the GPS'''
-        if not self.ublox_handling.checkState():
+        if not self.ublox_handling.isChecked():
             self.ublox_msg_out = None
             return
         if self.ublox_msg_out is None:
@@ -565,7 +565,7 @@ def process_socket(self):
 
             if buf is None or len(buf) == 0:
                 break
-            if self.ublox_handling.checkState():
+            if self.ublox_handling.isChecked():
                 # we will send the data on packet boundaries
                 self.handle_ublox_data_in(buf)
             else:
diff --git a/dronecan_gui_tool/setup_window.py b/dronecan_gui_tool/setup_window.py
index 9bb8783..e36eebc 100644
--- a/dronecan_gui_tool/setup_window.py
+++ b/dronecan_gui_tool/setup_window.py
@@ -274,7 +274,7 @@ def on_ok():
         kwargs['baudrate'] = baud_rate_value
         kwargs['bitrate'] = int(bitrate.value())
         kwargs['bus_number'] = int(bus_number.value())
-        kwargs['filtered'] = filtered.checkState()
+        kwargs['filtered'] = filtered.isChecked()
         kwargs['mavlink_source_system'] = int(source_system.value())
         kwargs['mavlink_target_system'] = int(target_system.value())
         kwargs['mavlink_signing_key'] = signing_key.text()
diff --git a/dronecan_gui_tool/widgets/local_node.py b/dronecan_gui_tool/widgets/local_node.py
index 22c5824..73078c2 100644
--- a/dronecan_gui_tool/widgets/local_node.py
+++ b/dronecan_gui_tool/widgets/local_node.py
@@ -149,7 +149,7 @@ def __init__(self, parent, node):
             self._filtering.setTristate(False)
             filter_list = node.can_driver.get_filter_list()
             if filter_list is not None and len(filter_list) > 0:
-                self._filtering.setCheckState(2)
+                self._filtering.setChecked(True)
             self._filtering.stateChanged.connect(self.change_filtering)
 
         layout = QHBoxLayout(self)