diff --git a/flask_images/core.py b/flask_images/core.py
index 8682604..833d973 100755
--- a/flask_images/core.py
+++ b/flask_images/core.py
@@ -1,7 +1,6 @@
 from __future__ import division
 
 from io import BytesIO as StringIO
-from subprocess import call
 import base64
 import cgi
 import datetime
@@ -344,7 +343,7 @@ def handle_request(self, path):
                     fh = open(tmp_path, 'wb')
                     fh.write(remote_file)
                     fh.close()
-                call(['mv', tmp_path, path])
+                os.rename(tmp_path, path)
         else:
             path = self.find_img(path)
             if not path: