diff --git a/scripts/joinmarket-qt.py b/scripts/joinmarket-qt.py
index f3f11d0..11be9ed 100755
--- a/scripts/joinmarket-qt.py
+++ b/scripts/joinmarket-qt.py
@@ -443,7 +443,7 @@ class SpendTab(QWidget):
             return False
         return True
 
-    def generateTumbleSchedule(self):
+    async def generateTumbleSchedule(self):
         if not mainWindow.wallet_service:
             asyncio.ensure_future(
                 JMQtMessageBox(self, "Cannot start without a loaded wallet.",
@@ -452,7 +452,8 @@ class SpendTab(QWidget):
         #needs a set of tumbler options and destination addresses, so needs
         #a wizard
         wizard = ScheduleWizard()
-        wizard_return = wizard.exec_()
+        wizard.open()
+        wizard_return = await wizard.result()
         if wizard_return == QDialog.Rejected:
             return
         try:
@@ -597,7 +598,8 @@ class SpendTab(QWidget):
         self.schedule_set_button = QPushButton('Choose schedule file')
         self.schedule_set_button.clicked.connect(self.selectSchedule)
         self.schedule_generate_button = QPushButton('Generate tumble schedule')
-        self.schedule_generate_button.clicked.connect(self.generateTumbleSchedule)
+        self.schedule_generate_button.clicked.connect(
+            lambda: asyncio.ensure_future(self.generateTumbleSchedule()))
         self.sch_startButton = QPushButton('Run schedule')
         self.sch_startButton.setEnabled(False) #not runnable until schedule chosen
         self.sch_startButton.clicked.connect(self.startMultiple)
diff --git a/scripts/qtsupport.py b/scripts/qtsupport.py
index 9c08977..57c0a40 100644
--- a/scripts/qtsupport.py
+++ b/scripts/qtsupport.py
@@ -915,8 +915,12 @@ class SchIntroPage(QWizardPage):
 """
 
 class ScheduleWizard(QWizard):
+
     def __init__(self):
         super().__init__()
+        self.setModal(True)
+        self.result_fut = asyncio.get_event_loop().create_future()
+        self.finished.connect(self.on_finished)
         self.setWindowTitle("Joinmarket schedule generator")
         self.setPage(0, SchIntroPage(self))
         self.setPage(1, SchDynamicPage1(self))
@@ -924,11 +928,18 @@ class ScheduleWizard(QWizard):
         #self.setPage(3, SchStaticPage(self))
         self.setPage(3, SchFinishPage(self))
 
+    @QtCore.Slot(QMessageBox.StandardButton)
+    def on_finished(self, button):
+        self.result_fut.set_result(button)
+
+    async def result(self):
+        await self.result_fut
+        return self.result_fut.result()
+
     def get_name(self):
         #TODO de-hardcode generated name
         return "TUMBLE.schedule"
 
-
     def get_destaddrs(self):
         return self.destaddrs