diff --git a/src/bitmessageqt/__init__.py b/src/bitmessageqt/__init__.py
index b448422b..bf82525c 100644
--- a/src/bitmessageqt/__init__.py
+++ b/src/bitmessageqt/__init__.py
@@ -808,7 +808,7 @@ class MyForm(settingsmixin.SMainWindow):
         elif TTL > 28 * 24 * 60 * 60:  # 28 days
             TTL = 28 * 24 * 60 * 60
         self.ui.horizontalSliderTTL.setSliderPosition(
-            (TTL - 3600) ** (1 / 3.199))
+            int((TTL - 3600) ** (1 / 3.199)))
         self.updateHumanFriendlyTTLDescription(TTL)
 
         self.ui.horizontalSliderTTL.valueChanged.connect(self.updateTTL)
diff --git a/src/bitmessageqt/foldertree.py b/src/bitmessageqt/foldertree.py
index 5d62b4f3..db09a5d6 100644
--- a/src/bitmessageqt/foldertree.py
+++ b/src/bitmessageqt/foldertree.py
@@ -4,7 +4,10 @@ Folder tree and messagelist widgets definitions.
 # pylint: disable=too-many-arguments
 # pylint: disable=attribute-defined-outside-init
 
-from cgi import escape
+try:
+    from cgi import escape
+except ImportError:
+    from html import escape
 
 from unqstr import ustr, unic
 from dbcompat import dbstr
diff --git a/src/shutdown.py b/src/shutdown.py
index 441d655e..7b875f64 100644
--- a/src/shutdown.py
+++ b/src/shutdown.py
@@ -23,7 +23,11 @@ def doCleanShutdown():
 
     objectProcessorQueue.put(('checkShutdownVariable', 'no data'))
     for thread in threading.enumerate():
-        if thread.isAlive() and isinstance(thread, StoppableThread):
+        try:
+            alive = thread.isAlive()
+        except AttributeError:
+            alive = thread.is_alive()
+        if alive and isinstance(thread, StoppableThread):
             thread.stopThread()
 
     UISignalQueue.put((