diff --git a/bin/github-backup b/bin/github-backup
index 583d3ee..fe3f8e9 100755
--- a/bin/github-backup
+++ b/bin/github-backup
@@ -18,6 +18,7 @@ import subprocess
 import sys
 import time
 import platform
+PY2 = False
 try:
     # python 3
     from urllib.parse import urlparse
@@ -30,6 +31,7 @@ try:
     from urllib.request import build_opener
 except ImportError:
     # python 2
+    PY2 = True
     from urlparse import urlparse
     from urllib import quote as urlquote
     from urllib import urlencode
@@ -549,7 +551,11 @@ class S3HTTPRedirectHandler(HTTPRedirectHandler):
     so we should remove said header on redirect.
     """
     def redirect_request(self, req, fp, code, msg, headers, newurl):
-        request = super(S3HTTPRedirectHandler, self).redirect_request(req, fp, code, msg, headers, newurl)
+        if PY2:
+            # HTTPRedirectHandler is an old style class
+            request = HTTPRedirectHandler.redirect_request(self, req, fp, code, msg, headers, newurl)
+        else:
+            request = super(S3HTTPRedirectHandler, self).redirect_request(req, fp, code, msg, headers, newurl)
         del request.headers['Authorization']
         return request