diff --git a/ChangeLog b/ChangeLog
index 358cfbf8e..287f0945a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2013-01-12  Moritz Bunkus  <moritz@bunkus.org>
+
+        * Source distribution: source code archives (tarballs) will be
+        compressed with xz instead of bzip2 from now on. The file name's
+        extension will therefore change from ".tar.bz2" to ".tar.xz". The
+        download URL changes accordingly.
+
 2013-01-11  Moritz Bunkus  <moritz@bunkus.org>
 
         * mkvmerge: new feature: Implemented reading VobSubs from MP4
diff --git a/contrib/fedora-core.spec b/contrib/fedora-core.spec
index 13c9fda8a..a9574ef31 100644
--- a/contrib/fedora-core.spec
+++ b/contrib/fedora-core.spec
@@ -6,7 +6,7 @@ Version: 5.9.0
 Release: 1
 License: GPL
 Group: Multimedia
-Source: %{name}-%{version}.tar.bz2
+Source: %{name}-%{version}.tar.xz
 BuildRoot: %{_tmppath}/%{name}-%{version}-tmproot
 BuildRequires: gcc gcc-c++ make flac-devel libogg-devel libvorbis-devel wxGTK-devel >= 2.8 boost-devel file-devel lzo-devel bzip2-devel zlib-devel gettext-devel ruby libcurl-devel
 
diff --git a/contrib/opensuse-12.spec b/contrib/opensuse-12.spec
index ddb123a0d..01e2afec6 100644
--- a/contrib/opensuse-12.spec
+++ b/contrib/opensuse-12.spec
@@ -13,7 +13,7 @@ Release: 1
 Summary:      tools to create, alter and inspect Matroska files
 License:      GPL
 Group:        Productivity/Multimedia/Other
-Source:       %{name}-%{version}.tar.bz2
+Source:       %{name}-%{version}.tar.xz
 Summary:      tools to create, alter and inspect Matroska files
 BuildRoot:    %{_tmppath}/%{name}-%{version}-build
 Prefix:       /usr
diff --git a/debian-upstream/watch b/debian-upstream/watch
index 48851a9f8..47ef9dc8a 100644
--- a/debian-upstream/watch
+++ b/debian-upstream/watch
@@ -1,2 +1,2 @@
 version=3
-http://www.bunkus.org/videotools/mkvtoolnix/sources/mkvtoolnix-(.*)\.tar\.bz2
+http://www.bunkus.org/videotools/mkvtoolnix/sources/mkvtoolnix-(.*)\.tar\.xz