diff --git a/Server/server_gui.py b/Server/server_gui.py
index 09f2a17..0dc74fd 100644
--- a/Server/server_gui.py
+++ b/Server/server_gui.py
@@ -248,6 +248,8 @@ class Ui_MainWindow(object):
         self.action_send_calibrations.setObjectName("action_send_calibrations")
         self.action_reboot_all = QtWidgets.QAction(MainWindow)
         self.action_reboot_all.setObjectName("action_reboot_all")
+        self.action_restart_chrony = QtWidgets.QAction(MainWindow)
+        self.action_restart_chrony.setObjectName("action_restart_chrony")
         self.menuDeveloper_mode.addAction(self.action_send_any_file)
         self.menuDeveloper_mode.addAction(self.actionSend_any_command)
         self.menuOptions.addAction(self.action_send_animations)
@@ -267,10 +269,11 @@ class Ui_MainWindow(object):
         self.menuDeveloper_mode_2.addAction(self.action_reboot_all)
         self.menuDrone.addAction(self.action_set_z_offset_to_ground)
         self.menuDrone.addAction(self.action_reset_z_offset)
+        self.menuDrone.addSeparator()
+        self.menuDrone.addAction(self.action_restart_chrony)
         self.menuDrone.addAction(self.action_remove_row)
         self.menuDrone.addSeparator()
         self.menuDrone.addAction(self.menuDeveloper_mode_2.menuAction())
-        self.menuDrone.addAction(self.action_remove_row)
         self.menuMusic.addAction(self.action_select_music_file)
         self.menuMusic.addAction(self.action_play_music)
         self.menuMusic.addAction(self.action_stop_music)
@@ -337,3 +340,4 @@ class Ui_MainWindow(object):
         self.action_remove_row.setText(_translate("MainWindow", "Remove from table"))
         self.action_send_calibrations.setText(_translate("MainWindow", "Send camera calibrations"))
         self.action_reboot_all.setText(_translate("MainWindow", "Reboot all"))
+        self.action_restart_chrony.setText(_translate("MainWindow", "Restart chrony"))
diff --git a/Server/server_gui.ui b/Server/server_gui.ui
index e1b5831..e61b532 100644
--- a/Server/server_gui.ui
+++ b/Server/server_gui.ui
@@ -425,10 +425,11 @@
     </widget>
     <addaction name="action_set_z_offset_to_ground"/>
     <addaction name="action_reset_z_offset"/>
+    <addaction name="separator"/>
+    <addaction name="action_restart_chrony"/>
     <addaction name="action_remove_row"/>
     <addaction name="separator"/>
     <addaction name="menuDeveloper_mode_2"/>
-    <addaction name="action_remove_row"/>
    </widget>
    <widget class="QMenu" name="menuMusic">
     <property name="title">
@@ -561,6 +562,11 @@
     <string>Reboot all</string>
    </property>
   </action>
+  <action name="action_restart_chrony">
+   <property name="text">
+    <string>Restart chrony</string>
+   </property>
+  </action>
  </widget>
  <tabstops>
   <tabstop>start_delay_spin</tabstop>
diff --git a/Server/server_qt.py b/Server/server_qt.py
index 2de6411..05197e3 100644
--- a/Server/server_qt.py
+++ b/Server/server_qt.py
@@ -160,6 +160,7 @@ class MainWindow(QtWidgets.QMainWindow):
         self.ui.action_reset_start.triggered.connect(self.reset_start)
         self.ui.action_set_z_offset_to_ground.triggered.connect(self.set_z_offset_to_ground)
         self.ui.action_reset_z_offset.triggered.connect(self.reset_z_offset)
+        self.ui.action_restart_chrony.triggered.connect(self.restart_chrony)
         self.ui.action_select_music_file.triggered.connect(self.select_music_file)
         self.ui.action_play_music.triggered.connect(self.play_music)
         self.ui.action_stop_music.triggered.connect(self.stop_music)
@@ -458,6 +459,11 @@ class MainWindow(QtWidgets.QMainWindow):
         for copter in self.model.user_selected():
             copter.client.send_message("reset_z_offset")
 
+    @pyqtSlot()
+    def restart_chrony(self):
+        for copter in self.model.user_selected():
+            copter.client.send_message("repair_chrony")
+
     @pyqtSlot()
     def select_music_file(self):
         path = QFileDialog.getOpenFileName(self, "Select music file", filter="Music files (*.mp3 *.wav)")[0]