diff --git a/_multibuild b/_multibuild
new file mode 100644
index 0000000..58ef5ee
--- /dev/null
+++ b/_multibuild
@@ -0,0 +1,3 @@
+<multibuild>
+  <package>doc</package>
+</multibuild>
diff --git a/libcbor-0.8.0.tar.gz b/libcbor-0.8.0.tar.gz
deleted file mode 100644
index 50f8604..0000000
--- a/libcbor-0.8.0.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:618097166ea4a54499646998ccaa949a5816e6a665cf1d6df383690895217c8b
-size 267044
diff --git a/libcbor-0.9.0.tar.gz b/libcbor-0.9.0.tar.gz
new file mode 100644
index 0000000..0fd3078
--- /dev/null
+++ b/libcbor-0.9.0.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:da81e4f9333e0086d4e2745183c7052f04ecc4dbcffcf910029df24f103c15d1
+size 275405
diff --git a/libcbor.changes b/libcbor.changes
index 612d817..6c7bdd2 100644
--- a/libcbor.changes
+++ b/libcbor.changes
@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+Sun Dec  5 09:42:57 UTC 2021 - Dirk Müller <dmueller@suse.com>
+
+- update to 0.9.0:
+  * Improved pkg-config paths handling
+  * Use explicit math.h linkage
+  * BREAKING: Fixed handling of items that exceed the host size_t range
+  * cbor_decode explicitly checks size to avoid overflows (previously broken,
+    potentially resulting in erroneous decoding on affected systems)
+- split docs into multibuild flavor to avoid build cycle via openssh<->
+  python-pyOpenSSL <-> python-cryptography
+
 -------------------------------------------------------------------
 Tue Sep 22 11:42:03 UTC 2020 - Ismail Dönmez <idonmez@suse.com>
 
diff --git a/libcbor.spec b/libcbor.spec
index 12b388c..82b1788 100644
--- a/libcbor.spec
+++ b/libcbor.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libcbor
 #
-# Copyright (c) 2020 SUSE LLC
+# Copyright (c) 2021 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,27 +17,28 @@
 
 
 %define socurrent  0
-%define sorevision 8
+%define sorevision 9
 %define soage      0
-
 %define lname   libcbor%{socurrent}_%{sorevision}
-
+%global flavor @BUILD_FLAVOR@%{nil}
 Name:           libcbor
-Version:        0.8.0
+Version:        0.9.0
 Release:        0
 Summary:        Library for parsing Concise Binary Object Representation (CBOR)
 License:        MIT
 Group:          Development/Libraries/C and C++
-URL:            http://libcbor.org
+URL:            https://github.com/PJK/libcbor
 Source0:        https://github.com/PJK/libcbor/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz
-BuildRequires:  cmake
+%if "%{flavor}" == "doc"
 BuildRequires:  doxygen
+BuildRequires:  python3-Sphinx
+BuildRequires:  python3-breathe
+%else
+BuildRequires:  cmake
 BuildRequires:  gcc-c++
 BuildRequires:  libcmocka-devel
 BuildRequires:  ninja
-BuildRequires:  python3-Sphinx
-BuildRequires:  python3-breathe
-BuildRequires:  valgrind
+%endif
 
 %description
 libcbor is a C99 library for parsing and generating CBOR (RFC 7049),
@@ -45,7 +46,20 @@ a general-purpose schema-less binary data format.
 
 It supports flexible memory management, UTF-8, streams & incremental
 processing, and has a layered architecture.
- 
+
+%package doc
+Summary:        Documentation for libcbor - Concise Binary Object Representation (CBOR)
+Group:          System/Libraries
+
+%description doc
+libcbor is a C99 library for parsing and generating CBOR (RFC 7049),
+a general-purpose schema-less binary data format.
+
+It supports flexible memory management, UTF-8, streams & incremental
+processing, and has a layered architecture.
+
+This package provides additional documentation.
+
 %package -n %{lname}
 Summary:        Library for parsing Concise Binary Object Representation (CBOR)
 Group:          System/Libraries
@@ -71,25 +85,36 @@ The libcbor-devel contains libraries and header files for libcbor.
 sed -i 's|${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/pkgconfig|${CMAKE_INSTALL_LIBDIR}/pkgconfig|' src/CMakeLists.txt
 
 %build
-make %{?_smp_mflags} -C doc man
+%if "%{flavor}" == "doc"
+%make_build -C doc man
+%else
 
 %define __builder ninja
 %cmake .. -DCMAKE_BUILD_TYPE=Release -DWITH_TESTS=ON
 %cmake_build
+%endif
 
 %install
-%cmake_install
-
+%if "%{flavor}" == "doc"
 mkdir -p %{buildroot}%{_mandir}/man1
 cp doc/build/man/* %{buildroot}%{_mandir}/man1
+%else
+
+%cmake_install
+%endif
 
 %post -n %{lname} -p /sbin/ldconfig
 %postun -n %{lname} -p /sbin/ldconfig
 
-%files -n %{lname}
+%if "%{flavor}" == "doc"
+%files doc
 %doc CHANGELOG.md README.md
-%license LICENSE.md
 %{_mandir}/*/*
+
+%else
+
+%files -n %{lname}
+%license LICENSE.md
 %{_libdir}/libcbor.so.%{socurrent}.%{sorevision}
 %{_libdir}/libcbor.so.%{socurrent}.%{sorevision}.%{soage}
 
@@ -101,5 +126,6 @@ cp doc/build/man/* %{buildroot}%{_mandir}/man1
 %{_includedir}/cbor/internal/*.h
 %{_libdir}/libcbor.so
 %{_libdir}/pkgconfig/libcbor.pc
+%endif
 
 %changelog