diff --git a/.gitignore b/.gitignore
index 5217757..f79727a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,3 +41,4 @@
 /createrepo_c-0.10.0.tar.gz
 /createrepo_c-0.11.0.tar.gz
 /createrepo_c-0.11.1.tar.gz
+/createrepo_c-0.12.0.tar.gz
diff --git a/createrepo_c.spec b/createrepo_c.spec
index 5f9fd84..92d4451 100644
--- a/createrepo_c.spec
+++ b/createrepo_c.spec
@@ -19,10 +19,16 @@
 %bcond_without python2
 %endif
 
+%if 0%{?rhel} || 0%{?fedora} <= 29
+%bcond_with zchunk
+%else
+%bcond_without zchunk
+%endif
+
 Summary:        Creates a common metadata repository
 Name:           createrepo_c
-Version:        0.11.1
-Release:        2%{?dist}
+Version:        0.12.0
+Release:        1%{?dist}
 License:        GPLv2+
 URL:            https://github.com/rpm-software-management/createrepo_c
 Source0:        %{url}/archive/%{version}/%{name}-%{version}.tar.gz
@@ -41,6 +47,10 @@ BuildRequires:  rpm-devel >= 4.8.0-28
 BuildRequires:  sqlite-devel
 BuildRequires:  xz-devel
 BuildRequires:  zlib-devel
+%if %{with zchunk}
+BuildRequires:  pkgconfig(zck) >= 0.9.11
+BuildRequires:  zchunk
+%endif
 Requires:       %{name}-libs =  %{version}-%{release}
 %if 0%{?rhel} == 6
 Requires: rpm >= 4.8.0-28
@@ -115,7 +125,7 @@ mkdir build-py3
 # Build createrepo_c with Python 2
 %if %{with python2}
 pushd build-py2
-  %cmake .. -DPYTHON_DESIRED:str=2
+  %cmake .. -DPYTHON_DESIRED:str=2 %{!?with_zchunk:-DWITH_ZCHUNK=OFF}
   make %{?_smp_mflags} RPM_OPT_FLAGS="%{optflags}"
   %if %{without python3}
   # Build C documentation
@@ -127,7 +137,7 @@ popd
 # Build createrepo_c with Pyhon 3
 %if %{with python3}
 pushd build-py3
-  %cmake .. -DPYTHON_DESIRED:str=3
+  %cmake .. -DPYTHON_DESIRED:str=3 %{!?with_zchunk:-DWITH_ZCHUNK=OFF}
   make %{?_smp_mflags} RPM_OPT_FLAGS="%{optflags}"
   # Build C documentation
   make doc-c
@@ -224,6 +234,10 @@ ln -sr %{buildroot}%{_bindir}/modifyrepo_c %{buildroot}%{_bindir}/modifyrepo
 %endif
 
 %changelog
+* Wed Dec 12 2018 Jaroslav Mracek <jmracek@redhat.com> - 0.12.0-1
+- Update to 0.12.0
+- Support of zchunk
+
 * Mon Nov 26 2018 Miro Hrončok <mhroncok@redhat.com> - 0.11.1-2
 - Drop Python 2 subpackage on Fedora 30 (#1651182)
 
diff --git a/sources b/sources
index 0338e6c..96e2c7c 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (createrepo_c-0.11.1.tar.gz) = b07b656a625c4637f521b6bcff1d4eb22df930b9033824dd7ccbd6e7eea66aa4df4c52cc84bc32391d20013bb3c06c02afcb8801c676af5ad860992197681e7a
+SHA512 (createrepo_c-0.12.0.tar.gz) = ac8a8b289092b9fd882e0f8f7885d5ed18289d2b2c1886918f81e85e63db7116a4b0e28492928445d5da8ac7834cbb769f72cfcc64f5635e71868de9ca030b08