diff --git a/devscripts/gh-pages/sign-versions.py b/devscripts/gh-pages/sign-versions.py
index dd126df52e..00cecce0cc 100755
--- a/devscripts/gh-pages/sign-versions.py
+++ b/devscripts/gh-pages/sign-versions.py
@@ -1,15 +1,20 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 
 import rsa
 import json
 from binascii import hexlify
 
+try:
+    input = raw_input
+except NameError:
+    pass
+
 versions_info = json.load(open('update/versions.json'))
 if 'signature' in versions_info:
 	del versions_info['signature']
 
 print('Enter the PKCS1 private key, followed by a blank line:')
-privkey = ''
+privkey = b''
 while True:
 	try:
 		line = input()
@@ -17,8 +22,7 @@ while True:
 		break
 	if line == '':
 		break
-	privkey += line + '\n'
-privkey = bytes(privkey, 'ascii')
+	privkey += line.encode('ascii') + b'\n'
 privkey = rsa.PrivateKey.load_pkcs1(privkey)
 
 signature = hexlify(rsa.pkcs1.sign(json.dumps(versions_info, sort_keys=True).encode('utf-8'), privkey, 'SHA-256')).decode()