diff --git a/libs/maintainers.txt b/libs/maintainers.txt
index de585bb52b..8f08e868a4 100644
--- a/libs/maintainers.txt
+++ b/libs/maintainers.txt
@@ -47,7 +47,7 @@ dynamic_bitset        Jeremy Siek <jeremy.siek -at- gmail.com>
 endian                Beman Dawes <bdawes -at- acm.org>
 exception             Emil Dotchevski <emil -at- revergestudios.com>
 fiber                 Oliver Kowalke <oliver.kowalke -at- gmail.com>
-filesystem            Beman Dawes <bdawes -at- acm.org>
+filesystem            Beman Dawes <bdawes -at- acm.org>, Andrey Semashev <andrey.semashev -at- gmail.com>
 flyweight             Joaquin M Lopez Munoz <joaquin.lopezmunoz -at- gmail.com>
 foreach               Eric Niebler <eric -at- boostpro.com>
 format                Samuel Krempp <krempp -at- crans.ens-cachan.fr>, James E. King III <jking -at- apache.org>
@@ -67,7 +67,7 @@ hana                  Louis Dionne <ldionne.2 -at- gmail.com>
 heap                  Tim Blechmann <tim -at- klingt.org>
 hof                   Paul Fultz II <pfultz2 -at- yahoo.com>
 icl                   Joachim Faulhaber <afojgo -at- gmail.com>
-integer               Daryle Walker <darylew -at- hotmail.com>
+integer               Daryle Walker <darylew -at- hotmail.com>, Andrey Semashev <andrey.semashev -at- gmail.com>
 interprocess          Ion Gaztanaga <igaztanaga -at- gmail.com>
 intrusive             Ion Gaztanaga <igaztanaga -at- gmail.com>
 io                    Daryle Walker <darylew -at- hotmail.com>
@@ -97,6 +97,7 @@ numeric/ublas         David Bellot <david.bellot -at- gmail.com>
 operators             Daniel Frey <d.frey -at- gmx.de>
 optional              Fernando Cacciola <fernando_cacciola -at- ciudad.com.ar>, Andrzej Krzemienski <akrzemi1 -at- gmail.com>
 parameter             David Abrahams <dave -at- boost-consulting.com>, Daniel Wallin <daniel -at- boostpro.com>
+parameter_python      David Abrahams <dave -at- boost-consulting.com>, Daniel Wallin <daniel -at- boostpro.com>
 phoenix               Joel de Guzman <djowel -at- gmail.com>, Thomas Heller <thom.heller -at- gmail.com>, John Fletcher <J.P.Fletcher -at- aston.ac.uk>
 poly_collection       Joaquin M Lopez Munoz <joaquin.lopezmunoz -at- gmail.com>
 polygon               Lucanus Simonson <lucanus.j.simonson -at- intel.com>, Andrii Sydorchuk <sydorchuk.andriy -at- gmail.com>