diff --git a/doc/jlatex/euslisp.hlp b/doc/jlatex/euslisp.hlp
index 4b27601ca..3b8beb886 100644
--- a/doc/jlatex/euslisp.hlp
+++ b/doc/jlatex/euslisp.hlp
@@ -1,5 +1,5 @@
 ; This file is help command list for euslisp
-"/home/k-okada/catkin_ws/ws_euslisp/src/euslisp/doc/jlatex" ; Directory of TeX manual
+"/tmp/EusLisp/doc/jlatex" ; Directory of TeX manual
 ;
 "and" 6 "jcontrols" 334 3
 "or" 6 "jcontrols" 541 3
@@ -806,7 +806,7 @@
 ":intersection" 1 "jgeometry" 8330 3
 ":union" 1 "jgeometry" 8621 3
 ":intersectionp" 1 "jgeometry" 8741 3
-":extreme-point" 1 "jgeometry" 9061 3
+":extream-point" 1 "jgeometry" 9061 3
 ":corners" 1 "jgeometry" 9210 3
 ":below" 1 "jgeometry" 9428 3
 ":body" 1 "jgeometry" 9792 3
diff --git a/doc/jlatex/jintro.tex b/doc/jlatex/jintro.tex
index ed0c27352..4240b7e42 100644
--- a/doc/jlatex/jintro.tex
+++ b/doc/jlatex/jintro.tex
@@ -222,6 +222,7 @@ \subsection{開発履歴}
 \item[2021] ARMの外部関数呼び出しのバグを修正した. オフライン描画を行うglpixmapsurfaceクラスを追加した．コンパイルした関数名を固定化した．helpファイルを読んだ後のファイルハンドラを閉じた．make-gdome,make-body-from-verticesで:primitiveを使って:csgをセットするようにした．i386のリンカにgccを利用するようにした．バージョンが9.28となった．
 \item[2022] ソースコード中にeuspointer\_t を導入した．mainthread(ctx)でmalloc()/cfree()を行うようにした．バージョンが9.29となった
 \item[2024] rotate-vertices, hash-tableのバグを修正した．gdb下で正しく動くようにした．バージョンが9.30となった
+            ソースコード中にcastを追加，reader.cのbuf[]のサイズを増やす，*features*に:s390x, :riscv64を追加（だたしfloatのdefforeignには未対応）．バージョンが9.31となった．
 \end{description}
 
 \subsection{インストール}
diff --git a/doc/jlatex/jmanual.dvi b/doc/jlatex/jmanual.dvi
index 99162da49..5db239a49 100644
Binary files a/doc/jlatex/jmanual.dvi and b/doc/jlatex/jmanual.dvi differ
diff --git a/doc/jlatex/jmanual.pdf b/doc/jlatex/jmanual.pdf
index 34464950b..24b974564 100644
Binary files a/doc/jlatex/jmanual.pdf and b/doc/jlatex/jmanual.pdf differ
diff --git a/doc/jlatex/jmanual.tex b/doc/jlatex/jmanual.tex
index ddb2c853f..9521da603 100644
--- a/doc/jlatex/jmanual.tex
+++ b/doc/jlatex/jmanual.tex
@@ -9,7 +9,7 @@
 \AtBeginDvi{\special{pdf:tounicode 90ms-RKSJ-UCS2}}\fi
 
 %%%
-\newcommand{\eusversion}{9.30}
+\newcommand{\eusversion}{9.31}
 
 
 \flushbottom
diff --git a/doc/latex/euslisp.hlp b/doc/latex/euslisp.hlp
index 50475e5c7..ec31014d8 100644
--- a/doc/latex/euslisp.hlp
+++ b/doc/latex/euslisp.hlp
@@ -1,5 +1,5 @@
 ; This file is help command list for euslisp
-"/home/k-okada/catkin_ws/ws_euslisp/src/euslisp/doc/latex" ; Directory of TeX manual
+"/tmp/EusLisp/doc/latex" ; Directory of TeX manual
 ;
 "and" 6 "controls" 308 3
 "or" 6 "controls" 473 3
@@ -808,7 +808,7 @@
 ":intersection" 1 "geometry" 7116 3
 ":union" 1 "geometry" 7336 3
 ":intersectionp" 1 "geometry" 7435 3
-":extreme-point" 1 "geometry" 7650 3
+":extream-point" 1 "geometry" 7650 3
 ":corners" 1 "geometry" 7781 3
 ":below" 1 "geometry" 7935 3
 ":body" 1 "geometry" 8153 3
diff --git a/doc/latex/intro.tex b/doc/latex/intro.tex
index 2139ad2ce..b9af6ed95 100644
--- a/doc/latex/intro.tex
+++ b/doc/latex/intro.tex
@@ -296,6 +296,7 @@ \subsection{Revision History}
 \item[2021] Version 9.28 is released. Fix bugs on foreign function call ARM. Add glpixmapsurface class for offline drawing. Fix compiled function name. Close file handler after reading help file. Set :primitive to set :csg on make-gdome and make-body-from-vertices. Use gcc as linker on i386.
 \item[2022] Version 9.29 is released. Introduce euspointer\_t in the source code. call malloc()/cfree() within mainthread(ctx).
 \item[2024] Version 9.30 is released. Fix bugs on rotate-vertices, hash-table. Fix running euslisp with gdb.
+            Version 9.31 is released. Added casts in source code, increase size of buf[] in reader.c, added :s390x, :riscv64 to *features* ( :float defforeign not yet supported).
 \end{description}
 
 \subsection{Installation}
diff --git a/doc/latex/manual.dvi b/doc/latex/manual.dvi
index cb8c7f104..debe774d4 100644
Binary files a/doc/latex/manual.dvi and b/doc/latex/manual.dvi differ
diff --git a/doc/latex/manual.pdf b/doc/latex/manual.pdf
index baab049a5..914942e9e 100644
Binary files a/doc/latex/manual.pdf and b/doc/latex/manual.pdf differ
diff --git a/doc/latex/manual.tex b/doc/latex/manual.tex
index c28585043..53fe88ef8 100644
--- a/doc/latex/manual.tex
+++ b/doc/latex/manual.tex
@@ -7,7 +7,7 @@
 \usepackage[dvipdfmx,bookmarks=true,bookmarksnumbered=true,bookmarkstype=toc]{hyperref}
 
 %%%
-\newcommand{\eusversion}{9.30}
+\newcommand{\eusversion}{9.31}
 
 \flushbottom
 \makeindex