diff --git a/texk/web2c/ChangeLog b/texk/web2c/ChangeLog
index 734140f1ff..a1073beb60 100644
--- a/texk/web2c/ChangeLog
+++ b/texk/web2c/ChangeLog
@@ -1,3 +1,7 @@
+2023-08-19  Andreas Scherer  <https://ascherer.github.io>
+
+	* ctangleboot.cin: CWEB 4.10 release.
+
 2023-06-28  Andreas Scherer  <https://ascherer.github.io>
 
 	* ctangleboot.cin,
diff --git a/texk/web2c/ctangleboot.cin b/texk/web2c/ctangleboot.cin
index c979474f13..bb015ef259 100644
--- a/texk/web2c/ctangleboot.cin
+++ b/texk/web2c/ctangleboot.cin
@@ -28,7 +28,7 @@
 /*:5*/
 #line 67 "cwebdir/ctangle.w"
 
-#define banner "This is CTANGLE, Version 4.9" \
+#define banner "This is CTANGLE, Version 4.10" \
  \
 
 #define _(s) gettext(s)  \
diff --git a/texk/web2c/cwebdir/ChangeLog b/texk/web2c/cwebdir/ChangeLog
index ed9fea6ccf..b416bc47d6 100644
--- a/texk/web2c/cwebdir/ChangeLog
+++ b/texk/web2c/cwebdir/ChangeLog
@@ -1,3 +1,27 @@
+2023-08-19  Andreas Scherer  <https://ascherer.github.io>
+
+	* Makefile,
+	* comm-{mac,mini,ql,w2c}.ch,
+	* comm-w2c.h,
+	* common.h,
+	* common.w,
+	* ctang-{bs,pc,ql,vms,w2c,w32}.ch,
+	* ctangle.c,
+	* ctangle.w,
+	* ctwill-w2c.ch,
+	* cweav-{bs,pc,ql,vms,w2c,w32}.ch,
+	* cweave.w,
+	* cwebmac.tex,
+	* cwebman-w2c.ch,
+	* cwebman.tex,
+	* po/cweb-tl.pot,
+	* po/cweb.pot,
+	* po/de/cweb-tl.po,
+	* po/de/cweb.po,
+	* po/it/cweb.po,
+	* prod-{cweave,twill}.w,
+	* prod.w: CWEB 4.10 release.
+
 2023-08-18  Andreas Scherer  <https://ascherer.github.io>
 
 	* comm-bs.ch,
diff --git a/texk/web2c/cwebdir/Makefile b/texk/web2c/cwebdir/Makefile
index 6556815d74..c547ef9154 100644
--- a/texk/web2c/cwebdir/Makefile
+++ b/texk/web2c/cwebdir/Makefile
@@ -1,6 +1,6 @@
 # This file is part of CWEB.
 # It is distributed WITHOUT ANY WARRANTY, express or implied.
-# Version 4.9 --- May 2023
+# Version 4.10 --- August 2023
 
 # Copyright (C) 1987,1990,1993,2000 Silvio Levy and Donald E. Knuth
 
@@ -205,6 +205,6 @@ tarball:
 	tar zcvhf /tmp/cweb.tgz $(ALL) examples
 
 ctan:
-	git archive -o ~/cweb-4.9.zip --prefix=cweb/ cweb-4.9
+	git archive -o ~/cweb-4.10.zip --prefix=cweb/ cweb-4.10
 	make PDF=pdf usermanual
-	cd ..; zip -r ~/cweb-4.9.zip cweb/cwebman.pdf
+	cd ..; zip -r ~/cweb-4.10.zip cweb/cwebman.pdf
diff --git a/texk/web2c/cwebdir/comm-mac.ch b/texk/web2c/cwebdir/comm-mac.ch
index f7260a4bad..83df560cb4 100644
--- a/texk/web2c/cwebdir/comm-mac.ch
+++ b/texk/web2c/cwebdir/comm-mac.ch
@@ -4,9 +4,9 @@ No changes to CTANGLE or CWEAVE are needed.
 (Contributed 13 Oct 2000 by AndPio@aol.com; slightly edited by Don Knuth)
 
 @x in limbo, change the title page document to specify Mac version
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
 @y
-  \centerline{(Version 4.9 for MacOS)}
+  \centerline{(Version 4.10 for MacOS)}
 @z
 
 @x section 23: Make input_ln accept \n, \r, \n\r, or \r\n as line endings
diff --git a/texk/web2c/cwebdir/comm-mini.ch b/texk/web2c/cwebdir/comm-mini.ch
index ccaaaea96d..00fdf33237 100644
--- a/texk/web2c/cwebdir/comm-mini.ch
+++ b/texk/web2c/cwebdir/comm-mini.ch
@@ -1,9 +1,9 @@
 Limbo.
 
 @x
-\def\title{Common code for CTANGLE and CWEAVE (4.9 [\TeX~Live])}
+\def\title{Common code for CTANGLE and CWEAVE (4.10 [\TeX~Live])}
 @y
-\def\title{COMMON (4.9 [\TeX~Live])}
+\def\title{COMMON (4.10 [\TeX~Live])}
 \def\contentspagenumber{0}
 @z
 
diff --git a/texk/web2c/cwebdir/comm-ql.ch b/texk/web2c/cwebdir/comm-ql.ch
index c00d7982be..592c7e04a1 100644
--- a/texk/web2c/cwebdir/comm-ql.ch
+++ b/texk/web2c/cwebdir/comm-ql.ch
@@ -10,24 +10,24 @@ ex <dev_>cc;'-v -h -c -=500000 -DCWEBINPUTS=flp2_ common_c'
 @x
 \def\v{\char'174} % vertical (|) in typewriter font
 
-\def\title{Common code for CTANGLE and CWEAVE (Version 4.9)}
+\def\title{Common code for CTANGLE and CWEAVE (Version 4.10)}
 \def\topofcontents{\null\vfill
   \centerline{\titlefont Common code for {\ttitlefont CTANGLE} and
     {\ttitlefont CWEAVE}}
   \vskip 15pt
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
   \vfill}
 \def\botofcontents{\vfill
 \noindent
 @y
 \def\v{\char'174} % vertical (|) in typewriter font
 
-\def\title{Common code for CTANGLE and CWEAVE (QL Version 4.9)}
+\def\title{Common code for CTANGLE and CWEAVE (QL Version 4.10)}
 \def\topofcontents{\null\vfill
   \centerline{\titlefont Common code for {\ttitlefont CTANGLE} and
     {\ttitlefont CWEAVE}}
   \vskip 15pt
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
   \vfill}
 \def\botofcontents{\vfill
 \noindent
diff --git a/texk/web2c/cwebdir/comm-w2c.ch b/texk/web2c/cwebdir/comm-w2c.ch
index 5a2fd90457..906003989f 100644
--- a/texk/web2c/cwebdir/comm-w2c.ch
+++ b/texk/web2c/cwebdir/comm-w2c.ch
@@ -17,16 +17,16 @@
 @q Please send comments, suggestions, etc. to tex-k@@tug.org.            @>
 
 @x
-\def\title{Common code for CTANGLE and CWEAVE (Version 4.9)}
+\def\title{Common code for CTANGLE and CWEAVE (Version 4.10)}
 @y
 \def\Kpathsea/{{\mc KPATHSEA\spacefactor1000}} \ifacro\sanitizecommand\Kpathsea{KPATHSEA}\fi
-\def\title{Common code for CTANGLE and CWEAVE (4.9 [\TeX~Live])}
+\def\title{Common code for CTANGLE and CWEAVE (4.10 [\TeX~Live])}
 @z
 
 @x
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
 @y
-  \centerline{(Version 4.9 [\TeX~Live])}
+  \centerline{(Version 4.10 [\TeX~Live])}
 @z
 
 @x
diff --git a/texk/web2c/cwebdir/comm-w2c.h b/texk/web2c/cwebdir/comm-w2c.h
index e916050b09..2a8eba1510 100644
--- a/texk/web2c/cwebdir/comm-w2c.h
+++ b/texk/web2c/cwebdir/comm-w2c.h
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023 (works also with later versions)
+% Version 4.10 --- August 2023 (works also with later versions)
 
 % Copyright (C) 1987,1990,1993 Silvio Levy and Donald E. Knuth
 
diff --git a/texk/web2c/cwebdir/common.h b/texk/web2c/cwebdir/common.h
index 2bfc1fbcbf..4104965917 100644
--- a/texk/web2c/cwebdir/common.h
+++ b/texk/web2c/cwebdir/common.h
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023 (works also with later versions)
+% Version 4.10 --- August 2023 (works also with later versions)
 
 % Copyright (C) 1987,1990,1993 Silvio Levy and Donald E. Knuth
 
diff --git a/texk/web2c/cwebdir/common.w b/texk/web2c/cwebdir/common.w
index b95dfdaa6b..dbcd57e31f 100644
--- a/texk/web2c/cwebdir/common.w
+++ b/texk/web2c/cwebdir/common.w
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023
+% Version 4.10 --- August 2023
 
 % Copyright (C) 1987,1990,1993,2000 Silvio Levy and Donald E. Knuth
 
@@ -22,12 +22,12 @@
 
 \def\v{\char'174} % vertical (|) in typewriter font
 
-\def\title{Common code for CTANGLE and CWEAVE (Version 4.9)}
+\def\title{Common code for CTANGLE and CWEAVE (Version 4.10)}
 \def\topofcontents{\null\vfill
   \centerline{\titlefont Common code for {\ttitlefont CTANGLE} and
     {\ttitlefont CWEAVE}}
   \vskip 15pt
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
   \vfill}
 \def\botofcontents{\vfill
 \noindent
diff --git a/texk/web2c/cwebdir/ctang-bs.ch b/texk/web2c/cwebdir/ctang-bs.ch
index 96c2bd416e..6c6331c0c7 100644
--- a/texk/web2c/cwebdir/ctang-bs.ch
+++ b/texk/web2c/cwebdir/ctang-bs.ch
@@ -17,12 +17,12 @@ by using "huge" pointers.
 The ``banner line'' defined here should be changed whenever \.{CTANGLE}
 is modified.
 
-@d banner "This is CTANGLE (Version 4.9)"
+@d banner "This is CTANGLE (Version 4.10)"
 @y
 The ``banner line'' defined here should be changed whenever \.{CTANGLE}
 is modified.
 
-@d banner "This is CTANGLE (Version 4.9pc/big)"
+@d banner "This is CTANGLE (Version 4.10pc/big)"
 @z
 
 
diff --git a/texk/web2c/cwebdir/ctang-pc.ch b/texk/web2c/cwebdir/ctang-pc.ch
index 6c8c9085eb..25d62cdb6b 100644
--- a/texk/web2c/cwebdir/ctang-pc.ch
+++ b/texk/web2c/cwebdir/ctang-pc.ch
@@ -9,9 +9,9 @@ that allows >64K arrays. If you need lots of bytes and toks, try the
 alternate change files with -bs suffix instead of -pc.
 
 @x section 1
-@d banner "This is CTANGLE (Version 4.9)"
+@d banner "This is CTANGLE (Version 4.10)"
 @y
-@d banner "This is CTANGLE (Version 4.9pc)"
+@d banner "This is CTANGLE (Version 4.10pc)"
 @z
 @x section 17
 @d max_bytes 100000 /* the number of bytes in identifiers,
diff --git a/texk/web2c/cwebdir/ctang-ql.ch b/texk/web2c/cwebdir/ctang-ql.ch
index 56eb681b3d..91aa24fff2 100644
--- a/texk/web2c/cwebdir/ctang-ql.ch
+++ b/texk/web2c/cwebdir/ctang-ql.ch
@@ -7,15 +7,15 @@ ex <dev_>cc;"-v -h -c -=500000 ctangle_c"
 
 
 @x
-\def\title{CTANGLE (Version 4.9)}
+\def\title{CTANGLE (Version 4.10)}
 @y
-\def\title{CTANGLE (QL Version 4.9)}
+\def\title{CTANGLE (QL Version 4.10)}
 @z
 
 @x section 1
-@d banner "This is CTANGLE (Version 4.9)"
+@d banner "This is CTANGLE (Version 4.10)"
 @y
-@d banner "This is CTANGLE (QL Version 4.9)"
+@d banner "This is CTANGLE (QL Version 4.10)"
 @z
 
 @x
diff --git a/texk/web2c/cwebdir/ctang-vms.ch b/texk/web2c/cwebdir/ctang-vms.ch
index e4b9edf71d..9e311d3aa3 100644
--- a/texk/web2c/cwebdir/ctang-vms.ch
+++ b/texk/web2c/cwebdir/ctang-vms.ch
@@ -10,9 +10,9 @@ created:
 (these changes not necessary for initial bootstrapping)
 
 @x section 1 (01-FEB-1992 ST)
-@d banner "This is CTANGLE (Version 4.9)"
+@d banner "This is CTANGLE (Version 4.10)"
 @y
-@d banner "This is CTANGLE (VAX/VMS Version 4.9)"
+@d banner "This is CTANGLE (VAX/VMS Version 4.10)"
 @z
 
 @x section 5 (01-FEB-1992 ST)
diff --git a/texk/web2c/cwebdir/ctang-w2c.ch b/texk/web2c/cwebdir/ctang-w2c.ch
index 6c93873f76..3cc109ccc5 100644
--- a/texk/web2c/cwebdir/ctang-w2c.ch
+++ b/texk/web2c/cwebdir/ctang-w2c.ch
@@ -17,15 +17,15 @@
 @q Please send comments, suggestions, etc. to tex-k@@tug.org.            @>
 
 @x
-\def\title{CTANGLE (Version 4.9)}
+\def\title{CTANGLE (Version 4.10)}
 @y
-\def\title{CTANGLE (Version 4.9 [\TeX~Live])}
+\def\title{CTANGLE (Version 4.10 [\TeX~Live])}
 @z
 
 @x
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
 @y
-  \centerline{(Version 4.9 [\TeX~Live])}
+  \centerline{(Version 4.10 [\TeX~Live])}
 @z
 
 @x
@@ -41,9 +41,9 @@
 @z
 
 @x
-@d banner "This is CTANGLE (Version 4.9)"
+@d banner "This is CTANGLE (Version 4.10)"
 @y
-@d banner "This is CTANGLE, Version 4.9"
+@d banner "This is CTANGLE, Version 4.10"
   /* will be extended by the \TeX~Live |versionstring| */
 @z
 
diff --git a/texk/web2c/cwebdir/ctang-w32.ch b/texk/web2c/cwebdir/ctang-w32.ch
index 4cffd1adb8..51d3212b13 100644
--- a/texk/web2c/cwebdir/ctang-w32.ch
+++ b/texk/web2c/cwebdir/ctang-w32.ch
@@ -4,9 +4,9 @@ This is the change file for CWEB's CTANGLE under Win32
 Changes necessary for compiling with Borland C/C++
 
 @x section 1
-@d banner "This is CTANGLE (Version 4.9)"
+@d banner "This is CTANGLE (Version 4.10)"
 @y
-@d banner "This is CTANGLE (Version 4.9win32)"
+@d banner "This is CTANGLE (Version 4.10win32)"
 @z
 
 @x section 24
diff --git a/texk/web2c/cwebdir/ctangle.c b/texk/web2c/cwebdir/ctangle.c
index bb2e5a2944..2c31732e22 100644
--- a/texk/web2c/cwebdir/ctangle.c
+++ b/texk/web2c/cwebdir/ctangle.c
@@ -15,7 +15,7 @@
 /*:5*/
 #line 67 "ctangle.w"
 
-#define banner "This is CTANGLE (Version 4.9)" \
+#define banner "This is CTANGLE (Version 4.10)" \
 
 #define ctangle false
 #define cweave true \
diff --git a/texk/web2c/cwebdir/ctangle.w b/texk/web2c/cwebdir/ctangle.w
index 005af4817f..c8ae55df85 100644
--- a/texk/web2c/cwebdir/ctangle.w
+++ b/texk/web2c/cwebdir/ctangle.w
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023
+% Version 4.10 --- August 2023
 
 % Copyright (C) 1987,1990,1993,2000 Silvio Levy and Donald E. Knuth
 
@@ -27,11 +27,11 @@
 \mathchardef\RA="3221 % right arrow
 \mathchardef\BA="3224 % double arrow
 
-\def\title{CTANGLE (Version 4.9)}
+\def\title{CTANGLE (Version 4.10)}
 \def\topofcontents{\null\vfill
   \centerline{\titlefont The {\ttitlefont CTANGLE} processor}
   \vskip 15pt
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
   \vfill}
 \def\botofcontents{\vfill
 \noindent
@@ -61,7 +61,7 @@ Joachim Schrod, Lee Wittenberg, and others who have contributed improvements.
 The ``banner line'' defined here should be changed whenever \.{CTANGLE}
 is modified.
 
-@d banner "This is CTANGLE (Version 4.9)"
+@d banner "This is CTANGLE (Version 4.10)"
 
 @c
 @<Include files@>@/
diff --git a/texk/web2c/cwebdir/ctwill-w2c.ch b/texk/web2c/cwebdir/ctwill-w2c.ch
index d0780e94f5..5ab95d2d61 100644
--- a/texk/web2c/cwebdir/ctwill-w2c.ch
+++ b/texk/web2c/cwebdir/ctwill-w2c.ch
@@ -35,10 +35,10 @@
 @z
 
 @x
-\def\title{CWEAVE (Version 4.9)}
+\def\title{CWEAVE (Version 4.10)}
 @y
 \def\Kpathsea/{{\mc KPATHSEA\spacefactor1000}} \ifacro\sanitizecommand\Kpathsea{KPATHSEA}\fi
-\def\title{CTWILL (Version 4.9 [\TeX~Live])}
+\def\title{CTWILL (Version 4.10 [\TeX~Live])}
 @z
 
 @x
@@ -48,9 +48,9 @@
 @z
 
 @x
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
 @y
-  \centerline{(Version 4.9 [\TeX~Live])}
+  \centerline{(Version 4.10 [\TeX~Live])}
 @z
 
 @x
@@ -77,7 +77,7 @@ Crusius, and others who have contributed improvements.
 The ``banner line'' defined here should be changed whenever \.{CWEAVE}
 is modified.
 
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 @y
 This is the \.{CTWILL} program by D. E. Knuth, based
 on \.{CWEAVE} by Silvio Levy and D.~E. Knuth. It is also based on
@@ -101,7 +101,7 @@ Until then, \.{CWEAVE}'s sequence of sections will be preserved.
 The ``banner line'' defined here should be changed whenever \.{CTWILL} is
 modified. The version number parallels the corresponding version of \.{CWEAVE}.
 
-@d banner "This is CTWILL, Version 4.9"
+@d banner "This is CTWILL, Version 4.10"
   /* will be extended by the \TeX~Live |versionstring| */
 @z
 
diff --git a/texk/web2c/cwebdir/cweav-bs.ch b/texk/web2c/cwebdir/cweav-bs.ch
index af1d6bf115..1d541d536b 100644
--- a/texk/web2c/cwebdir/cweav-bs.ch
+++ b/texk/web2c/cwebdir/cweav-bs.ch
@@ -20,12 +20,12 @@ This file contributed by Barry Schwartz, trashman@crud.mn.org, 28 Jun 94.
 The ``banner line'' defined here should be changed whenever \.{CWEAVE}
 is modified.
 
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 @y
 The ``banner line'' defined here should be changed whenever \.{CWEAVE}
 is modified.
 
-@d banner "This is CWEAVE (Version 4.9pc/big)"
+@d banner "This is CWEAVE (Version 4.10pc/big)"
 @z
 
 
diff --git a/texk/web2c/cwebdir/cweav-pc.ch b/texk/web2c/cwebdir/cweav-pc.ch
index 3b5874653d..76173410af 100644
--- a/texk/web2c/cwebdir/cweav-pc.ch
+++ b/texk/web2c/cwebdir/cweav-pc.ch
@@ -11,9 +11,9 @@ that allows >64K arrays. (If you need lots more bytes, try the alternate
 change files that have -bs in their name instead of -pc.)
 
 @x section 1
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 @y
-@d banner "This is CWEAVE (Version 4.9pc)"
+@d banner "This is CWEAVE (Version 4.10pc)"
 @z
 
 @x section 17
diff --git a/texk/web2c/cwebdir/cweav-ql.ch b/texk/web2c/cwebdir/cweav-ql.ch
index 89cbea1efd..8f40a9dca6 100644
--- a/texk/web2c/cwebdir/cweav-ql.ch
+++ b/texk/web2c/cwebdir/cweav-ql.ch
@@ -7,15 +7,15 @@ ex <dev_>cc;"-v -h -c =500000 cweave_c"
 
 
 @x
-\def\title{CWEAVE (Version 4.9)}
+\def\title{CWEAVE (Version 4.10)}
 @y
-\def\title{CWEAVE (QL Version 4.9)}
+\def\title{CWEAVE (QL Version 4.10)}
 @z
 
 @x section 1
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 @y
-@d banner "This is CWEAVE (QL Version 4.9)"
+@d banner "This is CWEAVE (QL Version 4.10)"
 @z
 
 @x
diff --git a/texk/web2c/cwebdir/cweav-vms.ch b/texk/web2c/cwebdir/cweav-vms.ch
index e62fae4399..d2cef52379 100644
--- a/texk/web2c/cwebdir/cweav-vms.ch
+++ b/texk/web2c/cwebdir/cweav-vms.ch
@@ -13,9 +13,9 @@ modified:
 (also modified by Don Knuth to keep version numbers uptodate)
 
 @x section 1 (01-FEB-1992 ST)
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 @y
-@d banner "This is CWEAVE (VAX/VMS Version 4.9)"
+@d banner "This is CWEAVE (VAX/VMS Version 4.10)"
 @z
 
 @x section 5 (01-FEB-1992 ST)
diff --git a/texk/web2c/cwebdir/cweav-w2c.ch b/texk/web2c/cwebdir/cweav-w2c.ch
index f60360c791..faf1b6ad8b 100644
--- a/texk/web2c/cwebdir/cweav-w2c.ch
+++ b/texk/web2c/cwebdir/cweav-w2c.ch
@@ -17,15 +17,15 @@
 @q Please send comments, suggestions, etc. to tex-k@@tug.org.            @>
 
 @x
-\def\title{CWEAVE (Version 4.9)}
+\def\title{CWEAVE (Version 4.10)}
 @y
-\def\title{CWEAVE (Version 4.9 [\TeX~Live])}
+\def\title{CWEAVE (Version 4.10 [\TeX~Live])}
 @z
 
 @x
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
 @y
-  \centerline{(Version 4.9 [\TeX~Live])}
+  \centerline{(Version 4.10 [\TeX~Live])}
 @z
 
 @x
@@ -41,9 +41,9 @@
 @z
 
 @x
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 @y
-@d banner "This is CWEAVE, Version 4.9"
+@d banner "This is CWEAVE, Version 4.10"
   /* will be extended by the \TeX~Live |versionstring| */
 @z
 
diff --git a/texk/web2c/cwebdir/cweav-w32.ch b/texk/web2c/cwebdir/cweav-w32.ch
index cc194e5f02..94f4c39aa6 100644
--- a/texk/web2c/cwebdir/cweav-w32.ch
+++ b/texk/web2c/cwebdir/cweav-w32.ch
@@ -2,9 +2,9 @@ This is the change file for CWEB's CWEAVE under Win32
 (Contributed by Fabrice Popineau, February 2002)
 
 @x section 1
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 @y
-@d banner "This is CWEAVE (Version 4.9win32)"
+@d banner "This is CWEAVE (Version 4.10win32)"
 @z
 
 @x section 32
diff --git a/texk/web2c/cwebdir/cweave.w b/texk/web2c/cwebdir/cweave.w
index c7ce99b7df..70654828c1 100644
--- a/texk/web2c/cwebdir/cweave.w
+++ b/texk/web2c/cwebdir/cweave.w
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023
+% Version 4.10 --- August 2023
 
 % Copyright (C) 1987,1990,1993,2000 Silvio Levy and Donald E. Knuth
 
@@ -32,11 +32,11 @@
 \def\skipxTeX{\\{skip\_\TEX/}}
 \def\copyxTeX{\\{copy\_\TEX/}}
 
-\def\title{CWEAVE (Version 4.9)}
+\def\title{CWEAVE (Version 4.10)}
 \def\topofcontents{\null\vfill
   \centerline{\titlefont The {\ttitlefont CWEAVE} processor}
   \vskip 15pt
-  \centerline{(Version 4.9)}
+  \centerline{(Version 4.10)}
   \vfill}
 \def\botofcontents{\vfill
 \noindent
@@ -67,7 +67,7 @@ Crusius, and others who have contributed improvements.
 The ``banner line'' defined here should be changed whenever \.{CWEAVE}
 is modified.
 
-@d banner "This is CWEAVE (Version 4.9)"
+@d banner "This is CWEAVE (Version 4.10)"
 
 @c
 @<Include files@>@/
diff --git a/texk/web2c/cwebdir/cwebmac.tex b/texk/web2c/cwebdir/cwebmac.tex
index b4a397c237..382400a3f7 100644
--- a/texk/web2c/cwebdir/cwebmac.tex
+++ b/texk/web2c/cwebdir/cwebmac.tex
@@ -1,8 +1,8 @@
 % standard macros for CWEB listings (in addition to plain.tex)
-% Version 4.9 --- May 2023
+% Version 4.10 --- August 2023
 \ifx\renewenvironment\undefined\else\endinput\fi % LaTeX will use other macros
-\xdef\fmtversion{\fmtversion+CWEB4.9}
-\chardef\cwebversion=4 \chardef\cwebrevision=9
+\xdef\fmtversion{\fmtversion+CWEB4.10}
+\chardef\cwebversion=4 \chardef\cwebrevision=10
 \input iftex.sty % TeX engine tests
 \ifx\pdf+\pdftrue\fi % for plain TeX in combination with dvipdfm
 % Uncomment the following line if you want PDF goodies to be the default
diff --git a/texk/web2c/cwebdir/cwebman-w2c.ch b/texk/web2c/cwebdir/cwebman-w2c.ch
index 0d6e400de5..929fd58d38 100644
--- a/texk/web2c/cwebdir/cwebman-w2c.ch
+++ b/texk/web2c/cwebdir/cwebman-w2c.ch
@@ -93,17 +93,17 @@
 @z
 
 @x
-\def\runninghead{{\tentt CWEB} USER MANUAL (VERSION 4.9)}
+\def\runninghead{{\tentt CWEB} USER MANUAL (VERSION 4.10)}
 @y
 \def\Kpathsea/{{\mc KPATHSEA\spacefactor1000}}
-\def\runninghead{{\tentt CWEB} USER MANUAL (Version 4.9 [\TeX~Live])}
+\def\runninghead{{\tentt CWEB} USER MANUAL (Version 4.10 [\TeX~Live])}
 @z
 
 @x
-\vskip 18pt\centerline{(Version 4.9 --- May 2023)}
+\vskip 18pt\centerline{(Version 4.10 --- August 2023)}
 @y
-\vskip 18pt\centerline{(Version 4.9 --- May 2023)%
-\footnote*{This document describes the extended \.{CWEB} (Version 4.9 [\TeX~Live]).}}
+\vskip 18pt\centerline{(Version 4.10 --- August 2023)%
+\footnote*{This document describes the extended \.{CWEB} (Version 4.10 [\TeX~Live]).}}
 @z
 
 @x
@@ -320,9 +320,9 @@ And here's what the same excerpt looks like when typeset.
 @z
 
 @x
-  \.{ { }\\vskip 15pt \\centerline\{(Version 4.9)\}{ }\\vfill\}}\cr}$$
+  \.{ { }\\vskip 15pt \\centerline\{(Version 4.10)\}{ }\\vfill\}}\cr}$$
 @y
-  \.{ { }\\vskip 15pt \\centerline\{(Version 4.9)\}{ }\\vfill\}}\cr}$$
+  \.{ { }\\vskip 15pt \\centerline\{(Version 4.10)\}{ }\\vfill\}}\cr}$$
 @z
 
 @x
diff --git a/texk/web2c/cwebdir/cwebman.tex b/texk/web2c/cwebdir/cwebman.tex
index d3b364dda5..108bd32f88 100644
--- a/texk/web2c/cwebdir/cwebman.tex
+++ b/texk/web2c/cwebdir/cwebman.tex
@@ -35,7 +35,7 @@
 
 \def\lheader{\mainfont\the\pageno\hfill\sc\runninghead\hfill}
 \def\rheader{\hfill\sc\runninghead\hfill\mainfont\the\pageno}
-\def\runninghead{{\tentt CWEB} USER MANUAL (VERSION 4.9)}
+\def\runninghead{{\tentt CWEB} USER MANUAL (VERSION 4.10)}
 
 % This verbatim mode assumes that ! marks are !! in the text being copied.
 \def\verbatim{\begingroup
@@ -49,7 +49,7 @@
 \null\vfill
 \centerline{\titlefont The {\ttitlefont CWEB} System of
     Structured Documentation}
-\vskip 18pt\centerline{(Version 4.9 --- May 2023)}
+\vskip 18pt\centerline{(Version 4.10 --- August 2023)}
 \vskip 24pt
 \centerline{\authorfont Donald E. Knuth and Silvio Levy}
 \vfill
@@ -1607,7 +1607,7 @@
   \.{ { }\\titlefalse \% include headline on the contents page}\cr
   \.{ { }\\def\\rheader\{\\mainfont The \{\\tt CWEAVE\}{ }processor\\hfil\}}\cr
   \.{ { }\\centerline\{\\titlefont The \{\\ttitlefont CWEAVE\}{ }processor\}}\cr
-  \.{ { }\\vskip 15pt \\centerline\{(Version 4.9)\}{ }\\vfill\}}\cr}$$
+  \.{ { }\\vskip 15pt \\centerline\{(Version 4.10)\}{ }\\vfill\}}\cr}$$
 Redefining \.{\\rheader}, which is the headline for right-hand pages,
 suffices in this case to put the desired information at the top of the
 contents page.
diff --git a/texk/web2c/cwebdir/po/cweb-tl.pot b/texk/web2c/cwebdir/po/cweb-tl.pot
index ad045d2517..5805bf0a10 100644
--- a/texk/web2c/cwebdir/po/cweb-tl.pot
+++ b/texk/web2c/cwebdir/po/cweb-tl.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: CWEBbin 2023\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-05-15 16:11+0200\n"
+"POT-Creation-Date: 2023-08-19 15:20+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -30,15 +30,15 @@ msgid "%s: Need one to three file arguments.\n"
 msgstr ""
 
 #: ctang-texlive.ch:39
-msgid "This is CTANGLE, Version 4.9"
+msgid "This is CTANGLE, Version 4.10"
 msgstr ""
 
 #: ctwill-texlive.ch:39
-msgid "This is CTWILL, Version 4.9"
+msgid "This is CTWILL, Version 4.10"
 msgstr ""
 
 #: cweav-texlive.ch:39
-msgid "This is CWEAVE, Version 4.9"
+msgid "This is CWEAVE, Version 4.10"
 msgstr ""
 
 #: comm-texlive.ch:512
diff --git a/texk/web2c/cwebdir/po/cweb.pot b/texk/web2c/cwebdir/po/cweb.pot
index c67ceadc42..f1d04e7dc4 100644
--- a/texk/web2c/cwebdir/po/cweb.pot
+++ b/texk/web2c/cwebdir/po/cweb.pot
@@ -523,15 +523,15 @@ msgid "Sorting:"
 msgstr ""
 
 #: ctang-i18n.ch:17
-msgid "This is CTANGLE (Version 4.9 [CWEBbin 2023])"
+msgid "This is CTANGLE (Version 4.10 [CWEBbin 2023])"
 msgstr ""
 
 #: cweav-twill.ch:61
-msgid "This is CTWILL (Version 4.9 [CWEBbin 2023])"
+msgid "This is CTWILL (Version 4.10 [CWEBbin 2023])"
 msgstr ""
 
 #: cweav-i18n.ch:17 cweav-twill.ch:42
-msgid "This is CWEAVE (Version 4.9 [CWEBbin 2023])"
+msgid "This is CWEAVE (Version 4.10 [CWEBbin 2023])"
 msgstr ""
 
 #: cweav-i18n.ch:301 cweav-i18n.ch:309
diff --git a/texk/web2c/cwebdir/po/de/cweb-tl.po b/texk/web2c/cwebdir/po/de/cweb-tl.po
index da6f725f60..e9fd5df921 100644
--- a/texk/web2c/cwebdir/po/de/cweb-tl.po
+++ b/texk/web2c/cwebdir/po/de/cweb-tl.po
@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: CWEBbin 2023\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-05-15 16:13+0200\n"
-"PO-Revision-Date: 2023-05-15 16:13+0200\n"
+"POT-Creation-Date: 2023-08-19 15:20+0200\n"
+"PO-Revision-Date: 2023-08-19 15:20+0200\n"
 "Last-Translator: Andreas Scherer <andreas_github@freenet.de>\n"
 "Language-Team: German\n"
 "Language: de\n"
@@ -33,16 +33,16 @@ msgid "%s: Need one to three file arguments.\n"
 msgstr "%s: Benötige ein bis drei Dateiargumente.\n"
 
 #: ctang-texlive.ch:39
-msgid "This is CTANGLE, Version 4.9"
-msgstr "Dies ist CTANGLE, Version 4.9"
+msgid "This is CTANGLE, Version 4.10"
+msgstr "Dies ist CTANGLE, Version 4.10"
 
 #: ctwill-texlive.ch:39
-msgid "This is CTWILL, Version 4.9"
-msgstr "Dies ist CTWILL, Version 4.9"
+msgid "This is CTWILL, Version 4.10"
+msgstr "Dies ist CTWILL, Version 4.10"
 
 #: cweav-texlive.ch:39
-msgid "This is CWEAVE, Version 4.9"
-msgstr "Dies ist CWEAVE, Version 4.9"
+msgid "This is CWEAVE, Version 4.10"
+msgstr "Dies ist CWEAVE, Version 4.10"
 
 #: comm-texlive.ch:512
 #, c-format
diff --git a/texk/web2c/cwebdir/po/de/cweb.po b/texk/web2c/cwebdir/po/de/cweb.po
index 0767166f68..2b950e9a13 100644
--- a/texk/web2c/cwebdir/po/de/cweb.po
+++ b/texk/web2c/cwebdir/po/de/cweb.po
@@ -603,16 +603,16 @@ msgid "Sorting:"
 msgstr "Sortieren:"
 
 #: ctang-i18n.ch:17
-msgid "This is CTANGLE (Version 4.9 [CWEBbin 2023])"
-msgstr "Dies ist CTANGLE (Version 4.9 [CWEBbin 2023])"
+msgid "This is CTANGLE (Version 4.10 [CWEBbin 2023])"
+msgstr "Dies ist CTANGLE (Version 4.10 [CWEBbin 2023])"
 
 #: cweav-twill.ch:61
-msgid "This is CTWILL (Version 4.9 [CWEBbin 2023])"
-msgstr "Dies ist CTWILL (Version 4.9 [CWEBbin 2023])"
+msgid "This is CTWILL (Version 4.10 [CWEBbin 2023])"
+msgstr "Dies ist CTWILL (Version 4.10 [CWEBbin 2023])"
 
 #: cweav-i18n.ch:17 cweav-twill.ch:42
-msgid "This is CWEAVE (Version 4.9 [CWEBbin 2023])"
-msgstr "Dies ist CWEAVE (Version 4.9 [CWEBbin 2023])"
+msgid "This is CWEAVE (Version 4.10 [CWEBbin 2023])"
+msgstr "Dies ist CWEAVE (Version 4.10 [CWEBbin 2023])"
 
 #: cweav-i18n.ch:301 cweav-i18n.ch:309
 msgid "buffer"
diff --git a/texk/web2c/cwebdir/po/it/cweb.po b/texk/web2c/cwebdir/po/it/cweb.po
index a107bbede7..ea9ba5081c 100644
--- a/texk/web2c/cwebdir/po/it/cweb.po
+++ b/texk/web2c/cwebdir/po/it/cweb.po
@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: CWEBbin 2023\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-05-15 16:14+0200\n"
-"PO-Revision-Date: 2023-05-15 16:14+0200\n"
+"POT-Creation-Date: 2023-08-19 15:20+0200\n"
+"PO-Revision-Date: 2023-08-19 15:20+0200\n"
 "Last-Translator: Andreas Scherer <andreas_github@freenet.de>\n"
 "Language-Team: Italian\n"
 "Language: it\n"
@@ -598,16 +598,16 @@ msgid "Sorting:"
 msgstr "Ordinamento:"
 
 #: ctang-i18n.ch:17
-msgid "This is CTANGLE (Version 4.9 [CWEBbin 2023])"
-msgstr "Questo è CTANGLE (Versione 4.9 [CWEBbin 2023])"
+msgid "This is CTANGLE (Version 4.10 [CWEBbin 2023])"
+msgstr "Questo è CTANGLE (Versione 4.10 [CWEBbin 2023])"
 
 #: cweav-i18n.ch:17
-msgid "This is CWEAVE (Version 4.9 [CWEBbin 2023])"
-msgstr "Questo è CWEAVE (Versione 4.9 [CWEBbin 2023])"
+msgid "This is CWEAVE (Version 4.10 [CWEBbin 2023])"
+msgstr "Questo è CWEAVE (Versione 4.10 [CWEBbin 2023])"
 
 #: cweav-twill.ch:68
-msgid "This is CTWILL (Version 4.9 [CWEBbin 2023])"
-msgstr "Questo è CTWILL (Versione 4.9 [CWEBbin 2023])"
+msgid "This is CTWILL (Version 4.10 [CWEBbin 2023])"
+msgstr "Questo è CTWILL (Versione 4.10 [CWEBbin 2023])"
 
 #: cweav-i18n.ch:301 cweav-i18n.ch:309
 msgid "buffer"
diff --git a/texk/web2c/cwebdir/prod-cweave.w b/texk/web2c/cwebdir/prod-cweave.w
index 6043435ff2..6432fd9325 100644
--- a/texk/web2c/cwebdir/prod-cweave.w
+++ b/texk/web2c/cwebdir/prod-cweave.w
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023
+% Version 4.10 --- August 2023
 %
 @ Here is a table of all the productions.  Each production that
 combines two or more consecutive scraps implicitly inserts a {\tt \$}
diff --git a/texk/web2c/cwebdir/prod-twill.w b/texk/web2c/cwebdir/prod-twill.w
index 82f0f78345..231722a491 100644
--- a/texk/web2c/cwebdir/prod-twill.w
+++ b/texk/web2c/cwebdir/prod-twill.w
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023
+% Version 4.10 --- August 2023
 %
 @ Here is a table of all the productions.  Each production that
 combines two or more consecutive scraps implicitly inserts a {\tt \$}
diff --git a/texk/web2c/cwebdir/prod.w b/texk/web2c/cwebdir/prod.w
index 5be387f13d..c7254cc4ee 100644
--- a/texk/web2c/cwebdir/prod.w
+++ b/texk/web2c/cwebdir/prod.w
@@ -2,7 +2,7 @@
 % This program by Silvio Levy and Donald E. Knuth
 % is based on a program by Knuth.
 % It is distributed WITHOUT ANY WARRANTY, express or implied.
-% Version 4.9 --- May 2023
+% Version 4.10 --- August 2023
 %
 @ Here is a table of all the productions.  Each production that
 combines two or more consecutive scraps implicitly inserts a {\tt \$}
diff --git a/texk/web2c/man/ChangeLog b/texk/web2c/man/ChangeLog
index 84df823ac4..cd900057da 100644
--- a/texk/web2c/man/ChangeLog
+++ b/texk/web2c/man/ChangeLog
@@ -1,3 +1,7 @@
+2023-08-19  Andreas Scherer  <https://ascherer.github.io>
+
+	* ctwill.man: CWEB 4.10 release.
+
 2023-06-16  Andreas Scherer  <https://ascherer.github.io>
 
 	* ctwill.man: Add information on 'ctwill-proofsort'.
diff --git a/texk/web2c/man/ctwill.man b/texk/web2c/man/ctwill.man
index 5d6a1293c4..b635fd0e5c 100644
--- a/texk/web2c/man/ctwill.man
+++ b/texk/web2c/man/ctwill.man
@@ -14,7 +14,7 @@
 . ftr VB CB
 . ftr VBI CBI
 .\}
-.TH "CTWILL" "1" "June 16, 2023" "Web2c @VERSION@" "General Commands Manual"
+.TH "CTWILL" "1" "August 19, 2023" "Web2c @VERSION@" "General Commands Manual"
 .hy
 .SH NAME
 .PP
@@ -142,7 +142,7 @@ The present incarnation of \f[B]ctwill\f[R] and its utilities tries hard
 to be a drop-in replacement for the original package.
 There are, however, a few differences worth noting:
 .IP \[bu] 2
-This version is based on the most recent version of CWEB (4.9).
+This version is based on the most recent version of CWEB (4.10).
 .IP \[bu] 2
 In TeX\ Live the utility programs are prefixed with \f[B]ctwill-\f[R]
 and the macro files with \f[B]ct\f[R] for technical reasons.