diff --git a/yast2-update-3.1.20.tar.bz2 b/yast2-update-3.1.20.tar.bz2
deleted file mode 100644
index 16b620a..0000000
--- a/yast2-update-3.1.20.tar.bz2
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:526fef783e9bf18e6c3e7a35291dfddd3e2e4a3f57daae678a14b8231a2ccbb4
-size 58556
diff --git a/yast2-update-3.1.21.tar.bz2 b/yast2-update-3.1.21.tar.bz2
new file mode 100644
index 0000000..9b1039e
--- /dev/null
+++ b/yast2-update-3.1.21.tar.bz2
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ccb701be12f2db7265d68ec135b15901ca815f384548560f248dddcc6581f4dd
+size 58540
diff --git a/yast2-update.changes b/yast2-update.changes
index 7716611..4c22440 100644
--- a/yast2-update.changes
+++ b/yast2-update.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Mon Jul 28 14:12:31 UTC 2014 - lslezak@suse.cz
+
+- backup /var/lib/rpm at update to prevent from accidental
+  corruption (bnc#857639)
+- switch from bzip2 to gzip compression (slightly less compression
+  ratio, but much faster), use parallel gzip (pigz) for even
+  faster backup
+- 3.1.21
+
 -------------------------------------------------------------------
 Wed Jul 23 15:03:43 UTC 2014 - lslezak@suse.cz
 
diff --git a/yast2-update.spec b/yast2-update.spec
index 65e1076..0115515 100644
--- a/yast2-update.spec
+++ b/yast2-update.spec
@@ -17,7 +17,7 @@
 
 
 Name:           yast2-update
-Version:        3.1.20
+Version:        3.1.21
 Release:        0
 
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
@@ -61,6 +61,9 @@ Conflicts:      yast2-storage < 2.15.4
 
 Requires:       yast2-ruby-bindings >= 1.0.0
 
+# use parallel gzip when crating backup (much faster)
+Requires:       pigz
+
 Summary:        YaST2 - Update
 License:        GPL-2.0
 Group:          System/YaST