diff --git a/lib/core/settings.py b/lib/core/settings.py
index c1a9c37c0..cd8ef7ee8 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -20,7 +20,7 @@ from thirdparty import six
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.6.4.1"
+VERSION = "1.6.4.2"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/thirdparty/six/__init__.py b/thirdparty/six/__init__.py
index 4e15675d8..d4fe9849f 100644
--- a/thirdparty/six/__init__.py
+++ b/thirdparty/six/__init__.py
@@ -263,7 +263,7 @@ _moved_attributes = [
     MovedAttribute("reduce", "__builtin__", "functools"),
     MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
     MovedAttribute("StringIO", "StringIO", "io"),
-    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserDict", "UserDict", "collections", "IterableUserDict", "UserDict"),
     MovedAttribute("UserList", "UserList", "collections"),
     MovedAttribute("UserString", "UserString", "collections"),
     MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),