diff --git a/README b/README
index 481969d6..568f35fa 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-libtrace 4.0.22
+libtrace 4.0.23
 
 Code and documentation added since version 4.0.20 is
 Copyright (c) 2023 Shane Alcock and has been contributed as per
diff --git a/configure.in b/configure.in
index e745661a..06ba372c 100644
--- a/configure.in
+++ b/configure.in
@@ -3,11 +3,11 @@
 # Now you only need to update the version number in two places - below,
 # and in the README
 
-AC_INIT([libtrace],[4.0.22],[shane@alcock.co.nz],[libtrace])
+AC_INIT([libtrace],[4.0.23],[shane@alcock.co.nz],[libtrace])
 
 LIBTRACE_MAJOR=4
 LIBTRACE_MID=0
-LIBTRACE_MINOR=22
+LIBTRACE_MINOR=23
 
 # OpenSolaris hides libraries like libncurses in /usr/gnu/lib, which is not
 # searched by default - add it to LDFLAGS so we at least have a chance of 
@@ -102,8 +102,10 @@ ADD_LDFLAGS="$ADD_LDFLAGS -L\$(abs_top_srcdir)/lib"
 LIBTRACE_LIBS=""
 TOOLS_LIBS=""
 
-CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wextra -DLT_BUILDING_DLL=1"
-CXXFLAGS="$CXXFLAGS -Wall -DLT_BUILDING_DLL=1"
+CFLAGS="$CFLAGS  -Wall -Wmissing-prototypes -Wextra -DLT_BUILDING_DLL=1"
+CXXFLAGS="$CXXFLAGS  -Wall -DLT_BUILDING_DLL=1"
+#CFLAGS="$CFLAGS -fsanitize=address -Wall -Wmissing-prototypes -Wextra -DLT_BUILDING_DLL=1"
+#CXXFLAGS="$CXXFLAGS -fsanitize=address -Wall -DLT_BUILDING_DLL=1"
 
 AC_ARG_ENABLE(address-san, AS_HELP_STRING(--enable-address-san, Enable address and memory sanitisation),
 [
diff --git a/debian/changelog b/debian/changelog
index 159002f2..fdf18b27 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,19 @@
+libtrace4 (4.0.23-1) unstable; urgency=medium
+
+  * Add new tool: traceucast, a TCP unicast variant of tracemcast.
+  * Add new input format: ndagtcp, for receiving packets sent by
+    traceucast.
+  * libpacketdump: fix premature free when decoding IPMM IRIs
+    received via an etsilive input.
+  * tracemcast: fix bug where the sequence number was not being
+    incremented for each sent datagram.
+  * object cache data structure: fix potential segfault after
+    resizing the cache.
+  * pcapfile: fix issue where packets owned by "dead" pcapfile trace
+    would have an invalid pcap version.
+
+ -- Shane Alcock <shane@alcock.co.nz>  Fri, 10 Nov 2023 09:40:41 +1300
+
 libtrace4 (4.0.22-1) unstable; urgency=medium
 
   * Fix segmentation fault when closing an ndag input that had
diff --git a/lib/Makefile.am b/lib/Makefile.am
index d14b0126..fafa62b5 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -146,7 +146,7 @@ endif
 
 AM_CPPFLAGS= @ADD_INCLS@
 libtrace_la_LIBADD = @LIBTRACE_LIBS@ @LTLIBOBJS@ $(DPDKLIBS)
-libtrace_la_LDFLAGS=-version-info 7:6:0 @ADD_LDFLAGS@
+libtrace_la_LDFLAGS=-version-info 7:7:0 @ADD_LDFLAGS@
 dagapi.c:
 	cp @DAG_TOOLS_DIR@/dagapi.c .
 
diff --git a/libpacketdump/Makefile.am b/libpacketdump/Makefile.am
index cb3dd3f1..41c667a2 100644
--- a/libpacketdump/Makefile.am
+++ b/libpacketdump/Makefile.am
@@ -198,7 +198,7 @@ AM_CPPFLAGS= @ADD_INCLS@ -I../lib
 # a shared library.
 libpacketdump_la_LIBADD = @LIBPKTDUMP_LIBS@ 
 libpacketdump_la_LDFLAGS=\
-        -version-info 5:7:0 \
+        -version-info 5:8:0 \
         @ADD_LDFLAGS@
 
 AM_CXXFLAGS=-g -Wall -DDIRNAME=\"$(plugindir)\" $(AM_CPPFLAGS)
diff --git a/rpm/libtrace4.spec b/rpm/libtrace4.spec
index 8b30d0d7..11e8935f 100644
--- a/rpm/libtrace4.spec
+++ b/rpm/libtrace4.spec
@@ -1,5 +1,5 @@
 Name:           libtrace4
-Version:        4.0.22
+Version:        4.0.23
 Release:        1%{?dist}
 Summary:        C Library for capturing and analysing network packets
 
@@ -127,6 +127,9 @@ find $RPM_BUILD_ROOT -name '*.la' -exec rm -f {} ';'
 
 
 %changelog
+* Fri Nov 10 2023 Shane Alcock <shane@alcock.co.nz> - 4.0.23-1
+- Updated for 4.0.23 release
+
 * Wed Jun 14 2023 Shane Alcock <shane@alcock.co.nz> - 4.0.22-1
 - Updated for 4.0.22 release