diff --git a/flick/flicklib.py b/flick/flicklib.py
index 9eac795..369375e 100644
--- a/flick/flicklib.py
+++ b/flick/flicklib.py
@@ -100,12 +100,12 @@ def __init__(self):
         self.daemon = True
 
     def start(self):
-        if self.isAlive() == False:
+        if self.is_alive() == False:
             self.stop_event.clear()
             threading.Thread.start(self)
 
     def stop(self):
-        if self.isAlive() == True:
+        if self.is_alive() == True:
             # set event to signal thread to terminate
             self.stop_event.set()
             # block calling thread until thread really has terminated