diff --git a/codehigh.sty b/codehigh.sty
index 517cf1c..8399f8d 100644
--- a/codehigh.sty
+++ b/codehigh.sty
@@ -12,7 +12,7 @@
 
 \NeedsTeXFormat{LaTeX2e}
 \RequirePackage{expl3}
-\ProvidesExplPackage{codehigh}{2021-05-07}{2021B}
+\ProvidesExplPackage{codehigh}{2021-05-12}{2021C}
   {Highlight codes and demos with l3regex and lpeg}
 
 %\RequirePackage{xparse}
diff --git a/codehigh.tex b/codehigh.tex
index 3e374de..950ad65 100644
--- a/codehigh.tex
+++ b/codehigh.tex
@@ -10,7 +10,7 @@
   linkcolor=green3,
 }
 
-\newcommand*{\myversion}{2021B}
+\newcommand*{\myversion}{2021C}
 \newcommand*{\mydate}{Version \myversion\ (\the\year-\mylpad\month-\mylpad\day)}
 \newcommand*{\mylpad}[1]{\ifnum#1<10 0\the#1\else\the#1\fi}