4 files changed, 13 insertions, 9 deletions
diff --git a/Master/texmf-dist/doc/latex/mhchem/README b/Master/texmf-dist/doc/latex/mhchem/README
index 2d1b59ee88f..e3704f10d21 100644
--- a/Master/texmf-dist/doc/latex/mhchem/README
+++ b/Master/texmf-dist/doc/latex/mhchem/README
@@ -1,7 +1,7 @@
-The mhchem Bundle 2016-08-08
+The mhchem Bundle 2017-01-16
 
 containing
-- mhchem v4.05
+- mhchem v4.06
 - hpstatement v1.02
 - rsphrase v3.11
 
diff --git a/Master/texmf-dist/doc/latex/mhchem/mhchem.pdf b/Master/texmf-dist/doc/latex/mhchem/mhchem.pdf
index 274bf479488..f60b52bcd1c 100644
--- a/Master/texmf-dist/doc/latex/mhchem/mhchem.pdf
+++ b/Master/texmf-dist/doc/latex/mhchem/mhchem.pdf
diff --git a/Master/texmf-dist/doc/latex/mhchem/mhchem.tex b/Master/texmf-dist/doc/latex/mhchem/mhchem.tex
index acb79daef52..c5d8f9123d3 100644
--- a/Master/texmf-dist/doc/latex/mhchem/mhchem.tex
+++ b/Master/texmf-dist/doc/latex/mhchem/mhchem.tex
@@ -1,5 +1,5 @@
 %% mhchem.tex
-%% Copyright 2004-2016 Martin Hensel
+%% Copyright 2004-2017 Martin Hensel
 %
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License version 1.3c
@@ -67,7 +67,7 @@
   The mhchem Bundle\\[0.3em]
   \Large\textmd{%
     Documentation for the \LaTeX{} Packages\\
-    mhchem v4.05,\\% check
+    mhchem v4.06,\\% check
     hpstatement v1.02 and\\
     rsphrase v3.11}%
 }
@@ -76,7 +76,7 @@
   mhchem\makebox[0pt][l]{\textcolor{white}{NOSPAM}}@MartinHensel\makebox[1pt][l]{\textcolor{white}{.}}.de%
 }
 \date{%
-  2016-08-08% check
+  2017-01-16% check
 }
 \maketitle
 
@@ -899,6 +899,11 @@ Meaning and usage of \macro{bond} changed.
 
 \section{Most Recent Changes}% check
 
+\minisec{2017-01-16 mhchem v4.06}
+\begin{compactitem}
+\item Adapt to upcoming \LaTeX3 change
+\end{compactitem}
+
 \minisec{2016-08-07 mhchem v4.05}
 \begin{compactitem}
 \item extended variable recognition -- single lower-case letters in superscripts/subscripts are typeset in an italic font
@@ -906,7 +911,6 @@ Meaning and usage of \macro{bond} changed.
 \item fixed error handling for nonstopmode
 \end{compactitem}
 
-
 \minisec{2016-02-07 mhchem v4.04}
 \begin{compactitem}
 \item support for negative subscripts, \verb|\ce{^0_-1n-}|
diff --git a/Master/texmf-dist/tex/latex/mhchem/mhchem.sty b/Master/texmf-dist/tex/latex/mhchem/mhchem.sty
index 0c9c343ea37..bada124ae5b 100644
--- a/Master/texmf-dist/tex/latex/mhchem/mhchem.sty
+++ b/Master/texmf-dist/tex/latex/mhchem/mhchem.sty
@@ -1,5 +1,5 @@
 %% mhchem.sty
-%% Copyright 2004-2016 Martin Hensel
+%% Copyright 2004-2017 Martin Hensel
 %
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License version 1.3c
@@ -27,7 +27,7 @@
 % This work consists of all files listed in manifest.txt.
 %
 %
-\ProvidesPackage{mhchem}[2016/08/07 v4.05 for typesetting chemical formulae]
+\ProvidesPackage{mhchem}[2017/01/16 v4.06 for typesetting chemical formulae]
 \RequirePackage{expl3}
 \RequirePackage{l3keys2e}
 \RequirePackage{l3regex}
@@ -3280,7 +3280,7 @@
 \keys_define:nn { mhchem }
   {
     version .int_set:N = \l__mhchem_option_version_int,
-    version .value_required:,
+    version .value_required:n = true,
     version .initial:n = { -1 },
     version .default:n = { -1 },