Preferable way is to download tarball with the signature:
@verbatim
-% wget http://pygost.cypherpunks.ru/pygost-3.8.tar.xz
-% wget http://pygost.cypherpunks.ru/pygost-3.8.tar.xz.sig
-% gpg --verify pygost-3.8.tar.xz.sig pygost-3.8.tar.xz
-% xz -d < pygost-3.8.tar.xz | tar xf -
-% cd pygost-3.8
+% wget http://pygost.cypherpunks.ru/pygost-3.13.tar.xz
+% wget http://pygost.cypherpunks.ru/pygost-3.13.tar.xz.sig
+% gpg --verify pygost-3.13.tar.xz.sig pygost-3.13.tar.xz
+% xz -d < pygost-3.13.tar.xz | tar xf -
+% cd pygost-3.13
% python setup.py install
@end verbatim
But also you can use PIP (@strong{no} authentication is performed!):
@verbatim
-% pip install pygost==3.7
+% pip install pygost==3.13
@end verbatim
You @strong{have to} verify downloaded tarballs integrity and