diff --git a/libzrtpcpp-4.1.0.tar.xz b/libzrtpcpp-4.1.0.tar.xz
deleted file mode 100644
index 7702a28..0000000
--- a/libzrtpcpp-4.1.0.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0ab8eaac6a5a53948144eb48bd41167cb6c2d3885a60b8c325a3d98177d6171a
-size 1277856
diff --git a/libzrtpcpp-4.2.3.tar.lz b/libzrtpcpp-4.2.3.tar.lz
new file mode 100644
index 0000000..5851dcc
--- /dev/null
+++ b/libzrtpcpp-4.2.3.tar.lz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:59d5a7d58763e2fdd0e2360c4ec12df3ac1f8f6c7f9b0993c6ec07c6c16c1f38
+size 1291010
diff --git a/libzrtpcpp.changes b/libzrtpcpp.changes
index a310df2..3306101 100644
--- a/libzrtpcpp.changes
+++ b/libzrtpcpp.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Sat Jun 28 01:41:37 UTC 2014 - jengelh@inai.de
+
+- Update to new upstream release 4.2.3
+* Enhance SRTP handling to provide a longer bit-shift register
+* Add functions to read ZID cache entries, raw data, formatted
+  as string
+* Order full ZID list by secure-since date
+
 -------------------------------------------------------------------
 Sun Nov 24 13:16:43 UTC 2013 - jengelh@inai.de
 
diff --git a/libzrtpcpp.spec b/libzrtpcpp.spec
index b5f8a02..e79e945 100644
--- a/libzrtpcpp.spec
+++ b/libzrtpcpp.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libzrtpcpp
 #
-# Copyright (c) 2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -18,22 +18,21 @@
 
 Name:           libzrtpcpp
 %define lname	libzrtpcpp4
-Version:        4.1.0
+Version:        4.2.3
 Release:        0
 Summary:        A ccrtp extension for ZRTP support
 License:        GPL-3.0+
 Group:          Development/Libraries/C and C++
 Url:            http://www.gnutelephony.org/index.php/GNU_ZRTP
 
-#Freecode-URL:	http://freecode.com/projects/libzrtpcpp
 #Git-Clone:	git://github.com/wernerd/ZRTPCPP
-#Snapshot:	V4.1.0
+#Snapshot:	V4.2.3
 # No longer produces release tarballs since 3.x.
-Source:         %name-%version.tar.xz
+Source:         %name-%version.tar.lz
 BuildRequires:  cmake
 BuildRequires:  gcc-c++
+BuildRequires:  lzip
 BuildRequires:  pkgconfig
-BuildRequires:  xz
 %if 0%{?suse_version} >= 1130
 BuildRequires:  pkgconfig(libccrtp) >= 2
 BuildRequires:  pkgconfig(libcrypto) >= 0.9.8