diff --git a/safeurl.py b/safeurl.py
index a9be918..a46f12e 100644
--- a/safeurl.py
+++ b/safeurl.py
@@ -15,7 +15,7 @@
 import re
 import netaddr
 import pycurl
-import StringIO
+from io import StringIO
 
 # Python 2.7/3 urlparse
 try: