NEWS                                    | 3 +++
 VERSION                                 | 2 +-
 pygost/stubs/pygost/gost28147_mac.pyi   | 5 ++++-
 pygost/stubs/pygost/gost34112012.pyi    | 5 ++++-
 pygost/stubs/pygost/gost34112012256.pyi | 5 ++++-
 pygost/stubs/pygost/gost34112012512.pyi | 5 ++++-
 pygost/stubs/pygost/gost341194.pyi      | 5 ++++-
 www.texi                                | 3 +++

diff --git a/NEWS b/NEWS
index e63a03a936cc83b865ada74b42fcb2aeabd35f4181a972b3fceb1fed68f83f13..2b09ca9d4bddebd88fbf17d332b17cbf436e226e0f12864bcdd689739baae6e3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+3.1:
+    Fixed mypy stubs related to PEP247-successors.
+
 3.0:
     * gost3411_94 renamed to gost341194
     * gost3411_2012 renamed and split to gost34112012256, gost34112012512
diff --git a/VERSION b/VERSION
index a233cfcdb584133924ee353c0e37f95386fd922c8fe14b78fef107e3d103bae5..eac7f115ab4ad1209330f28ff2c5bc44db822d0dd059bf1863830486cb93ffd4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.0
+3.1
diff --git a/pygost/stubs/pygost/gost28147_mac.pyi b/pygost/stubs/pygost/gost28147_mac.pyi
index 75fe0113e09b7bdba6b2acb5ced5c769fafcb52fdb5f296b0475779196fdaf45..33e709be5fbd5b31bbdcfb182e5a1f739a3c9cdc09b0f7db08c15f662edaf268 100644
--- a/pygost/stubs/pygost/gost28147_mac.pyi
+++ b/pygost/stubs/pygost/gost28147_mac.pyi
@@ -1,4 +1,7 @@
-class MAC:
+from pygost.iface import PEP247
+
+
+class MAC(PEP247):
     def __init__(
         self,
         key: bytes,
diff --git a/pygost/stubs/pygost/gost34112012.pyi b/pygost/stubs/pygost/gost34112012.pyi
index 34beed47a8bb1d3df1805961518251d721b6ed50f92adbfcf9a10f415e741164..1b297ade6dd5c2b5ecb266f64fcb15bac0c9accbaa0738a0b96003b51c6488c3 100644
--- a/pygost/stubs/pygost/gost34112012.pyi
+++ b/pygost/stubs/pygost/gost34112012.pyi
@@ -1,4 +1,7 @@
-class GOST34112012:
+from pygost.iface import PEP247
+
+
+class GOST34112012(PEP247):
     def __init__(self, data: bytes=..., digest_size: int=...) -> None: ...
 
     @property
diff --git a/pygost/stubs/pygost/gost34112012256.pyi b/pygost/stubs/pygost/gost34112012256.pyi
index 9558af5c54c40c287a43197210cce837df08ef4901180b08c630f93cb79d22d5..b784c57c5071256ed6572754daf5db99db97c5ac33b9d172a3f1d8df85780bda 100644
--- a/pygost/stubs/pygost/gost34112012256.pyi
+++ b/pygost/stubs/pygost/gost34112012256.pyi
@@ -1,4 +1,7 @@
-class GOST34112012256:
+from pygost.iface import PEP247
+
+
+class GOST34112012256(PEP247):
     def __init__(self, data: bytes=...) -> None: ...
 
     @property
diff --git a/pygost/stubs/pygost/gost34112012512.pyi b/pygost/stubs/pygost/gost34112012512.pyi
index b216b6cf5a3faf7df52013f6287f5c48f4b413e77cbafbdc1ca96cd3696b4bbd..dae414c0455374b69437d47069eb9b3a6bdf561ae149171697079747281ca1ca 100644
--- a/pygost/stubs/pygost/gost34112012512.pyi
+++ b/pygost/stubs/pygost/gost34112012512.pyi
@@ -1,4 +1,7 @@
-class GOST34112012512:
+from pygost.iface import PEP247
+
+
+class GOST34112012512(PEP247):
     def __init__(self, data: bytes=...) -> None: ...
 
     @property
diff --git a/pygost/stubs/pygost/gost341194.pyi b/pygost/stubs/pygost/gost341194.pyi
index 8b12b431f4c6f1898526d1a8e514cecd2262583fe8eb479475268d8ea78c4922..cef7d8c70b90303f689bdba2e6d846666c5fe09c580c4838c95710bd593841a0 100644
--- a/pygost/stubs/pygost/gost341194.pyi
+++ b/pygost/stubs/pygost/gost341194.pyi
@@ -1,4 +1,7 @@
-class GOST341194:
+from pygost.iface import PEP247
+
+
+class GOST341194(PEP247):
     def __init__(self, data: bytes=..., sbox: str=...) -> None: ...
 
     @property
diff --git a/www.texi b/www.texi
index 2efbe3c7640e196c5b093bec3ee72a34e95301361fd217880968eea0ac6278c2..a66c11754b6bef3dd64a2313b07154ae80c55a2826bfd659693e1310074bfed7 100644
--- a/www.texi
+++ b/www.texi
@@ -88,6 +88,9 @@ @node News
 @unnumbered News
 
 @table @strong
+@item 3.1
+Fixed mypy stubs related to PEP247-successors.
+
 @item 3.0
     @itemize
     @item @code{gost3411_94} renamed to @code{gost341194}