diff --git a/libzypp-17.21.0.tar.bz2 b/libzypp-17.21.0.tar.bz2
deleted file mode 100644
index e694cbc..0000000
--- a/libzypp-17.21.0.tar.bz2
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f5070a1f81fdac422315aacec28ec963c0a151293abb1b65d78604ea23e8f8a8
-size 4741075
diff --git a/libzypp-17.22.0.tar.bz2 b/libzypp-17.22.0.tar.bz2
new file mode 100644
index 0000000..7c11c85
--- /dev/null
+++ b/libzypp-17.22.0.tar.bz2
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6342eadfbc9f28264a038563d9f125009dc78ce8fbc8ffc0942270202d1ee46f
+size 4724466
diff --git a/libzypp.changes b/libzypp.changes
index b668b67..ab364bd 100644
--- a/libzypp.changes
+++ b/libzypp.changes
@@ -1,9 +1,17 @@
+-------------------------------------------------------------------
+Thu Jan 23 16:30:19 CET 2020 - ma@suse.de
+
+- yum::Downloader: Prefer zchunk compressed metadata if libvsolv
+  supports it.
+- BuildRequires:  libsolv-devel >= 0.7.11.
+- version 17.22.0 (22)
+
 -------------------------------------------------------------------
 Mon Jan 20 12:53:12 CET 2020 - ma@suse.de
 
 - Selectable: Fix highestAvailableVersionObj if only retracted
   packages are available. Avoid using retracted items as candidate
-  (jira#SLE-8905)
+  (jsc#SLE-8770)
 - version 17.21.0 (20)
 
 -------------------------------------------------------------------
diff --git a/libzypp.spec b/libzypp.spec
index 26daff8..53026b8 100644
--- a/libzypp.spec
+++ b/libzypp.spec
@@ -16,8 +16,14 @@
 #
 
 
+%if 0%{?is_opensuse} && (0%{?sle_version} >= 150100 || 0%{?suse_version} > 1500)
+%bcond_without zchunk
+%else
+%bcond_with zchunk
+%endif
+
 Name:           libzypp
-Version:        17.21.0
+Version:        17.22.0
 Release:        0
 Url:            https://github.com/openSUSE/libzypp
 Summary:        Library for package, patch, pattern and product management
@@ -71,7 +77,7 @@ BuildRequires:  pkgconfig
 BuildRequires:  pkg-config
 %endif
 
-BuildRequires:  libsolv-devel >= 0.7.10
+BuildRequires:  libsolv-devel >= 0.7.11
 %if 0%{?suse_version} >= 1100
 BuildRequires:  libsolv-tools
 %requires_eq    libsolv-tools
@@ -129,6 +135,10 @@ BuildRequires:  asciidoc
 BuildRequires:  libxslt-tools
 %endif
 
+%if %{with zchunk}
+BuildRequires:  libzck-devel
+%endif
+
 %description
 libzypp is the package management library that powers applications
 like YaST, zypper and the openSUSE/SLE implementation of PackageKit.
@@ -220,6 +230,7 @@ cmake -DCMAKE_INSTALL_PREFIX=%{_prefix} \
       -DLIB=%{_lib} \
       -DCMAKE_BUILD_TYPE=Release \
       -DCMAKE_SKIP_RPATH=1 \
+      %{?with_zchunk:-DENABLE_ZCHUNK_COMPRESSION=1} \
       ${EXTRA_CMAKE_OPTIONS} \
       ..
 make %{?_smp_mflags} VERBOSE=1