VERSION         |  2 +-
 doc/install.rst | 10 +++++-----
 doc/news.rst    |  7 +++++++
 makedist.sh     |  4 ++--
 pyderasn.py     |  4 ++--

diff --git a/VERSION b/VERSION
index bcc3d79cb7d0ca8e46edd533d676782b19ec2f6780f3de6f5f60d559eaa3ebad..25a9b0fc4ded141ddf807f2130da3842b793869264705eb090bcbde456c303dc 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.3
+5.4
diff --git a/doc/install.rst b/doc/install.rst
index bf77bd3c702e901b51679780797a4e37ba34422f4fed8accf6070bf76a90e78f..69ddcf95f151715c4e7b76d5f39b9bfa4a33ed8b1d983349cee14ae92ec00f28 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/>`__::
 
-    $ wget http://pyderasn.cypherpunks.ru/pyderasn-3.13.tar.xz
-    $ wget http://pyderasn.cypherpunks.ru/pyderasn-3.13.tar.xz.sig
-    $ gpg --verify pyderasn-3.13.tar.xz.sig pyderasn-3.13.tar.xz
-    $ xz -d < pyderasn-3.13.tar.xz | tar xf -
-    $ cd pyderasn-3.13
+    $ [fetch|wget] http://pyderasn.cypherpunks.ru/pyderasn-|VERSION|.tar.xz
+    $ [fetch|wget] http://pyderasn.cypherpunks.ru/pyderasn-5.4.tar.xz.sig
+    $ gpg --verify pyderasn-5.4.tar.xz.sig pyderasn-5.4.tar.xz
+    $ xz --decompress --stdout pyderasn-5.4.tar.xz | tar xf -
+    $ cd pyderasn-5.4
     $ python setup.py install
     # or copy pyderasn.py (+six.py, possibly termcolor.py) to your PYTHONPATH
 
diff --git a/doc/news.rst b/doc/news.rst
index afbd2577397f85300239805937edcdafa9cddb9b887d456b111fce98178c2547..872edc2ddf43666dc1d76ed1fec8b21f106b87867b2b73d84e3d2de285f9206f 100644
--- a/doc/news.rst
+++ b/doc/news.rst
@@ -1,6 +1,13 @@
 News
 ====
 
+.. _release5.4:
+
+5.4
+---
+* Do not shadow underlying ``DecodeError`` during decoding of optional
+  sequence's field
+
 .. _release5.3:
 
 5.3
diff --git a/makedist.sh b/makedist.sh
index f340a7956098f0ad39b2ea152d720b58a305833453927ac4d69ee253c26eefec..ad250d2cdbff6fa3715d21885eb0204f19e35cfb30dff61414b0aa4211e23209 100755
--- a/makedist.sh
+++ b/makedist.sh
@@ -15,10 +15,10 @@ tar cfI - $tmp/includes | tar xfC - $tmp/pyderasn-"$release"
 
 PYTHONPATH="$tmp/pyderasn-$release" make -C $tmp/pyderasn-"$release"/doc
 
-tar xvfC doc/download/six-*.tar.xz $tmp --include "*/*six.py"
+tar xvfC doc/download/six-1.13.0.tar.xz $tmp --include "*/*six.py"
 mv -v $tmp/six-*/*six.py $tmp/pyderasn-"$release"
 
-tar xvfC doc/download/termcolor-*.tar.xz $tmp --include "*/termcolor.py"
+tar xvfC doc/download/termcolor-1.1.0.tar.xz $tmp --include "*/termcolor.py"
 mv -v $tmp/termcolor-*/termcolor.py $tmp/pyderasn-"$release"
 
 cd $tmp
diff --git a/pyderasn.py b/pyderasn.py
index 00de8739193fa7a0f58a82017781b79d1bb28a545f10762b28b2a84c39335e59..93bedecbabb8b2fbaa585b1e3bacd3e43f9d890d9c3fc8411d27d39948f58d75 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -4885,8 +4885,8 @@                     decode_path=sub_decode_path,
                     ctx=ctx,
                     _ctx_immutable=False,
                 )
-            except TagMismatch:
-                if spec.optional:
+            except TagMismatch as err:
+                if (len(err.decode_path) == len(decode_path) + 1) and spec.optional:
                     continue
                 raise