VERSION         |  2 +-
 doc/install.rst | 12 ++++++------
 doc/news.rst    |  7 +++++++
 pyderasn.py     |  5 +++--

diff --git a/VERSION b/VERSION
index 3d470a9594054246df442ffe935077895e0ba5f47a676885080b08e949d4f0ed..7936f98d8f9b2866e12377a0d483d125f57d119ed72f148f5165ea58c867e812 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.2
+6.3
diff --git a/doc/install.rst b/doc/install.rst
index 964fd4ef811418cd5ce642345e271e3bcec0e8e32e28df14b0c82c45b9c8a48f..a23eb94748c0f849bdafb1350c0de05a3a42deb4e97bd3d720cfcd168e2f3474 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -4,11 +4,11 @@
 Preferable way is to :ref:`download <download>` tarball with the
 signature from `official website <http://pyderasn.cypherpunks.ru/>`__::
 
-    $ [fetch|wget] http://pyderasn.cypherpunks.ru/pyderasn-6.2.tar.xz
-    $ [fetch|wget] http://pyderasn.cypherpunks.ru/pyderasn-6.2.tar.xz.sig
-    $ gpg --verify pyderasn-6.2.tar.xz.sig pyderasn-6.2.tar.xz
-    $ xz --decompress --stdout pyderasn-6.2.tar.xz | tar xf -
-    $ cd pyderasn-6.2
+    $ [fetch|wget] http://pyderasn.cypherpunks.ru/pyderasn-6.3.tar.xz
+    $ [fetch|wget] http://pyderasn.cypherpunks.ru/pyderasn-6.3.tar.xz.sig
+    $ gpg --verify pyderasn-6.3.tar.xz.sig pyderasn-6.3.tar.xz
+    $ xz --decompress --stdout pyderasn-6.3.tar.xz | tar xf -
+    $ cd pyderasn-6.3
     $ python setup.py install
     # or copy pyderasn.py (+six.py, possibly termcolor.py) to your PYTHONPATH
 
@@ -19,7 +19,7 @@
 You could use pip (**no** OpenPGP authentication is performed!) with PyPI::
 
     $ cat > requirements.txt <<EOF
-    pyderasn==6.2 --hash=sha256:TO-BE-FILLED
+    pyderasn==6.3 --hash=sha256:TO-BE-FILLED
     six==1.14.0 --hash=sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a
     EOF
     $ pip install --requirement requirements.txt
diff --git a/doc/news.rst b/doc/news.rst
index dc4a7f52505485a6d6b1cdae3b20ed1c839f4762a3fac92d16030d0613a50420..edd8f86cb37b10daaa0375997c80f93f06925485cf69a06edd758d9e29e727fc 100644
--- a/doc/news.rst
+++ b/doc/news.rst
@@ -1,6 +1,13 @@
 News
 ====
 
+.. _release6.3:
+
+6.3
+---
+* Fixed workability under Python 3.5. Previously only 2.7 and 3.6
+  versions were tested
+
 .. _release6.2:
 
 6.2
diff --git a/pyderasn.py b/pyderasn.py
index e5d3f2b0fe3c7e1545acbc72cd692f94d64171de5c01c9c32babc301495b1960..8584dbeb6ca9e86ced0dfe198d179982793958d57b717673a0540b8a51044884 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -666,6 +666,7 @@ from math import ceil
 from os import environ
 from string import ascii_letters
 from string import digits
+from sys import version_info
 from unicodedata import category as unicat
 
 from six import add_metaclass
@@ -690,7 +691,7 @@ except ImportError:  # pragma: no cover
     def colored(what, *args, **kwargs):
         return what
 
-__version__ = "6.2"
+__version__ = "6.3"
 
 __all__ = (
     "Any",
@@ -764,7 +765,7 @@ EOC = b"\x00\x00"
 EOC_LEN = len(EOC)
 LENINDEF = b"\x80"  # length indefinite mark
 LENINDEF_PP_CHAR = "I" if PY2 else "∞"
-NAMEDTUPLE_KWARGS = {} if PY2 else {"module": __name__}
+NAMEDTUPLE_KWARGS = {} if version_info < (3, 6) else {"module": __name__}
 SET01 = frozenset("01")
 DECIMALS = frozenset(digits)
 DECIMAL_SIGNS = ".,"