diff --git a/.gitignore b/.gitignore
index 6b73967..e33177e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,3 +46,4 @@
 /librepo-1.9.0.tar.gz
 /librepo-1.9.1.tar.gz
 /librepo-1.9.2.tar.gz
+/librepo-1.9.4.tar.gz
diff --git a/librepo.spec b/librepo.spec
index 85d33c5..61b3d2a 100644
--- a/librepo.spec
+++ b/librepo.spec
@@ -9,18 +9,23 @@
 %endif
 
 %if 0%{?rhel} > 7 || 0%{?fedora} > 29
-# Do not build bindings for python2 for RHEL > 7 or Fedora > 29
+# Do not build bindings for python2 for RHEL > 7 and Fedora > 29
 %bcond_with python2
 %else
 %bcond_without python2
 %endif
 
+%if 0%{?rhel}
+%bcond_with zchunk
+%else
+%bcond_without zchunk
+%endif
 
 %global dnf_conflict 2.8.8
 
 Name:           librepo
-Version:        1.9.2
-Release:        3%{?dist}
+Version:        1.9.4
+Release:        1%{?dist}
 Summary:        Repodata downloading library
 
 License:        LGPLv2+
@@ -38,6 +43,9 @@ BuildRequires:  libcurl-devel >= 7.19.0
 BuildRequires:  pkgconfig(libxml-2.0)
 BuildRequires:  pkgconfig(libcrypto)
 BuildRequires:  pkgconfig(openssl)
+%if %{with zchunk}
+BuildRequires:  pkgconfig(zck) >= 0.9.11
+%endif
 
 %description
 A library providing C and Python (libcURL like) API to downloading repository
@@ -108,14 +116,14 @@ mkdir build-py3
 %build
 %if %{with python2}
 pushd build-py2
-  %cmake -DPYTHON_DESIRED:FILEPATH=%{__python2} ..
+  %cmake -DPYTHON_DESIRED:FILEPATH=%{__python2} %{!?with_zchunk:-DWITH_ZCHUNK=OFF} ..
   %make_build
 popd
 %endif
 
 %if %{with python3}
 pushd build-py3
-  %cmake -DPYTHON_DESIRED:FILEPATH=%{__python3} ..
+  %cmake -DPYTHON_DESIRED:FILEPATH=%{__python3} %{!?with_zchunk:-DWITH_ZCHUNK=OFF} ..
   %make_build
 popd
 %endif
@@ -178,6 +186,10 @@ popd
 %endif
 
 %changelog
+* Wed Feb 13 2019 Pavla Kratochvilova <pkratoch@redhat.com> - 1.9.4-1
+- Update to 1.9.4-1
+- Add zchunk support
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 1.9.2-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild
 
diff --git a/sources b/sources
index 51cff3b..b993339 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (librepo-1.9.2.tar.gz) = 3694d99b1600ce0bc4f14e11cc80dd37147ba9cf7221873fb938f9475bd5448e8593f8a142bb22e4f2eba274fbc3702856bb06b2889ab96912a53b631092c318
+SHA512 (librepo-1.9.4.tar.gz) = 88f061bf4a298292083a0d57dd80a5aac21795bcc2238ac41b5e605308c2161d1ccd0cfa2fec5b92fde22b2838f3a90eeb38cec08afb382fa2f902cae0ac177d