diff --git a/src/doc/languagespec.tex b/src/doc/languagespec.tex
index 7316f47b4..883e8cd4e 100644
--- a/src/doc/languagespec.tex
+++ b/src/doc/languagespec.tex
@@ -48,7 +48,7 @@
 
 \def\langname{Open Shading Language\xspace}
 \def\product{{\sffamily Open Shading Language}\xspace}
-\def\versionnumber{1.12}
+\def\versionnumber{1.13}
 \def\productver{\product\ {\sffamily \versionnumber}\xspace}
 
 
@@ -59,14 +59,14 @@
 Language Specification
 } \bigskip }
 \author{
-\copyright\ Copyright 2009-present Contributors to the Open Shading Language project. \\
+\copyright\ Copyright Contributors to the Open Shading Language project. \\
 All rights reserved.
  \bigskip \\
 \vspace{1in} \\
 Editor: Larry Gritz \\
 \emph{lg@imageworks.com}
 }
-\date{{\large Date: 27 Aug 2022 \\
+\date{{\large Date: 27 Oct 2023 \\
 % (with corrections, 24 Nov 2021)
 }
 \bigskip
@@ -135,7 +135,7 @@
 
 \vspace*{0.2in}
 
-Copyright \textcopyright\ 2009-present, Contributors to the Open Shading
+Copyright \textcopyright\ Contributors to the Open Shading
 Language project. All Rights Reserved.
 
 \vspace{0.5in}
@@ -380,9 +380,9 @@ \section*{Acknowledgments}
 other open source packages:
 
 \begin{itemize}
-\item {\cf OpenImageIO} \copyright\ 2008 Larry Gritz et al.  
+\item {\cf OpenImageIO} \copyright\ Contributors to OpenImageIO
 \url{http://openimageio.org}
-\item Ilmbase \copyright\ 2006, Industrial Light \& Magic.
+\item Imath \copyright\ Contributors to Imath.
 \url{http://www.openexr.com}
 \item Boost \copyright\ various authors.  \url{http://www.boost.org}
 \item LLVM \copyright\ 2003-2010 University of Illinois at
diff --git a/src/doc/osl-languagespec.pdf b/src/doc/osl-languagespec.pdf
index cc1c0e2dc..fff287801 100644
Binary files a/src/doc/osl-languagespec.pdf and b/src/doc/osl-languagespec.pdf differ