diff --git a/zulip/zulip/examples/upload-file b/zulip/zulip/examples/upload-file
index 0ac70aa..26dc9d8 100755
--- a/zulip/zulip/examples/upload-file
+++ b/zulip/zulip/examples/upload-file
@@ -3,7 +3,7 @@
 
 import argparse
 
-from six.moves import StringIO as _StringIO
+from io import StringIO as _StringIO
 from typing import IO, Any
 import zulip