diff --git a/video_thread.py b/video_thread.py
index 5a8120b..ed2af84 100644
--- a/video_thread.py
+++ b/video_thread.py
@@ -70,7 +70,7 @@ class Worker(QtCore.QObject):
 
       # write to out_pipe
       try:
-        out_pipe.stdin.write(im.tostring())
+        out_pipe.stdin.write(im.tobytes())
       finally:
         True
 
@@ -89,4 +89,4 @@ class Worker(QtCore.QObject):
     out_pipe.wait()
     print("Video file created")
     self.progressBarUpdate.emit(100)
-    self.videoCreated.emit()
\ No newline at end of file
+    self.videoCreated.emit()