diff --git a/javassist-rel_3_21_0_ga-javadoc.patch b/javassist-rel_3_21_0_ga-javadoc.patch
deleted file mode 100644
index 0ef09e5..0000000
--- a/javassist-rel_3_21_0_ga-javadoc.patch
+++ /dev/null
@@ -1,44 +0,0 @@
---- javassist-rel_3_21_0_ga/src/main/javassist/bytecode/analysis/package.html	2016-10-03 17:44:29.000000000 +0200
-+++ javassist-rel_3_21_0_ga/src/main/javassist/bytecode/analysis/package.html	2017-09-08 10:13:36.599899677 +0200
-@@ -11,10 +11,10 @@
- <p>The users of this package must know the specifications of
- class file and Java bytecode.  For more details, read this book:
- 
--<ul>Tim Lindholm and Frank Yellin,
-+<ul><li>Tim Lindholm and Frank Yellin,
- "The Java Virtual Machine Specification 2nd Ed.",
- Addison-Wesley, 1999.
--</ul>
-+</li></ul>
- 
- </body>
- </html>
---- javassist-rel_3_21_0_ga/src/main/javassist/bytecode/package.html	2016-10-03 17:44:29.000000000 +0200
-+++ javassist-rel_3_21_0_ga/src/main/javassist/bytecode/package.html	2017-09-08 10:12:48.055898848 +0200
-@@ -9,10 +9,10 @@
- <p>The users of this package must know the specifications of
- class file and Java bytecode.  For more details, read this book:
- 
--<ul>Tim Lindholm and Frank Yellin,
-+<ul><li>Tim Lindholm and Frank Yellin,
- "The Java Virtual Machine Specification 2nd Ed.",
- Addison-Wesley, 1999.
--</ul>
-+</li></ul>
- 
- </body>
- </html>
---- javassist-rel_3_21_0_ga/src/main/javassist/package.html	2016-10-03 17:44:29.000000000 +0200
-+++ javassist-rel_3_21_0_ga/src/main/javassist/package.html	2017-09-08 10:14:14.935900331 +0200
-@@ -12,9 +12,9 @@
- 
- <p>To know the version number of this package, type the following command:
- 
--<ul><pre>
-+<ul><li><pre>
- java -jar javassist.jar
--</pre></ul>
-+</pre></li></ul>
- 
- <p>It prints the version number on the console.
- 
diff --git a/javassist.changes b/javassist.changes
index ca75fac..04efa32 100644
--- a/javassist.changes
+++ b/javassist.changes
@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+Fri Oct  5 13:19:12 UTC 2018 - pmonrealgonzalez@suse.com
+
+- Version update to 3.23.1:
+  * 3.23.1 Github PR #171
+  * 3.23   Fix leaking file handlers in ClassPool and removed
+           ClassPath.close(). Github issue #165
+  * 3.22   Java 9 supports.
+           JIRA JASSIST-261.
+- Dropped patch fixed upstream:
+    javassist-rel_3_21_0_ga-javadoc.patch
+
 -------------------------------------------------------------------
 Fri Sep  8 08:16:21 UTC 2017 - fstrba@suse.com
 
diff --git a/javassist.spec b/javassist.spec
index ca3d53d..dc5ffc1 100644
--- a/javassist.spec
+++ b/javassist.spec
@@ -18,17 +18,17 @@
 #
 
 
+%define tar_version rel_3_23_1_ga
 Summary:        Java Programming Assistant: bytecode manipulation
 License:        LGPL-2.1-or-later OR MPL-1.1
 Group:          Development/Libraries/Java
 Name:           javassist
-%define tar_version rel_3_21_0_ga
-Version:        3.21.0
+Version:        3.23.1
 Release:        0
-Url:            http://www.csg.ci.i.u-tokyo.ac.jp/~chiba/javassist/
+Url:            https://www.javassist.org/
 Source0:        https://github.com/jboss-javassist/javassist/archive/%{tar_version}.tar.gz
-Patch0:         javassist-rel_3_21_0_ga-javadoc.patch
 BuildRequires:  ant >= 1.6
+BuildRequires:  fdupes
 BuildRequires:  java-devel >= 1.6
 BuildRequires:  javapackages-tools
 BuildArch:      noarch
@@ -77,7 +77,6 @@ Tutorial for javassist.
 
 %prep
 %setup -q -n %{name}-%{tar_version}
-%patch0 -p1
 for j in $(find . -name "*.jar"); do
         mv $j $j.no
 done
@@ -100,6 +99,8 @@ cp -pr sample/* $RPM_BUILD_ROOT%{_datadir}/%{name}-%{version}
 mkdir -p $RPM_BUILD_ROOT%{_javadocdir}/%{name}
 cp -pr html/* $RPM_BUILD_ROOT%{_javadocdir}/%{name}
 
+%fdupes -s $RPM_BUILD_ROOT/%{_javadocdir}/%{name}/jquery/
+
 # manual
 mkdir -p $RPM_BUILD_ROOT%{_docdir}/%{name}-%{version}/tutorial
 cp -pr tutorial/* $RPM_BUILD_ROOT%{_docdir}/%{name}-%{version}/tutorial
diff --git a/rel_3_21_0_ga.tar.gz b/rel_3_21_0_ga.tar.gz
deleted file mode 100644
index 98eb164..0000000
--- a/rel_3_21_0_ga.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ae3a3668fc9ac33ec15b871ce219df31e37c6614503067b033feb8a547669782
-size 1208816
diff --git a/rel_3_23_1_ga.tar.gz b/rel_3_23_1_ga.tar.gz
new file mode 100644
index 0000000..63f5a1f
--- /dev/null
+++ b/rel_3_23_1_ga.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:feb2630414c4b66c500b2f75867519bbaa68d303bc9db12fbddcca2717db0ada
+size 1263745