diff --git a/libs/maintainers.txt b/libs/maintainers.txt
index dc4a6a7905..972679e7cc 100644
--- a/libs/maintainers.txt
+++ b/libs/maintainers.txt
@@ -71,6 +71,7 @@ gil                   Stefan Seefeld <stefan -at- seefeld.name>, Mateusz Loskot
 graph                 Jeremy W. Murphy <jeremy.william.murphy -at- gmail.com>
 graph_parallel        K. Noel Belcourt <kbelco -at- sandia.gov>
 hana                  Louis Dionne <ldionne.2 -at- gmail.com>
+hash2                 Peter Dimov <pdimov -at- gmail.com>, Christian Mazakas <christian.mazakas -at- gmail.com>
 heap                  Tim Blechmann <tim -at- klingt.org>
 histogram             Hans Dembinski <hans.dembinski -at- gmail.com>
 hof                   Paul Fultz II <pfultz2 -at- yahoo.com>
@@ -98,6 +99,7 @@ move                  Ion Gaztanaga <igaztanaga -at- gmail.com>
 mp11                  Peter Dimov <pdimov -at- gmail.com>
 mpi                   K. Noel Belcourt <kbelco -at- sandia.gov>, Alain Miniussi <alain.miniussi -at- oca.eu>
 mpl                   Aleksey Gurtovoy <agurtovoy -at- meta-comm.com>
+mqtt5                 Ivica Siladić, Bruno Iljazović, Korina Šimičević
 msm                   Christophe Henry <christophe.j.henry -at-  googlemail.com>
 multi_array           Ronald Garcia <garcia -at- osl.iu.edu>
 multi_index           Joaquin M Lopez Munoz <joaquin.lopezmunoz -at- gmail.com>