diff --git a/hfst-ospell.spec b/hfst-ospell.spec
index 537d2be..6cc4679 100644
--- a/hfst-ospell.spec
+++ b/hfst-ospell.spec
@@ -1,5 +1,5 @@
 Name:          hfst-ospell
-Version:       0.5.1
+Version:       0.5.2
 Release:       1mamba
 Summary:       HFST spell checker library and command line tool
 Group:         Applications/Spelling Checker
@@ -7,23 +7,22 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://github.com/hfst/hfst-ospell
-## GITSOURCE https://github.com/hfst/hfst-ospell.git v0.5.1
 Source:        https://github.com/hfst/hfst-ospell.git/v%{version}/hfst-ospell-%{version}.tar.bz2
 License:       Apache License 2.0
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
+BuildRequires: ldconfig
 BuildRequires: libacl-devel
 BuildRequires: libarchive-devel
+BuildRequires: libattr-devel
 BuildRequires: libbzip2-devel
-BuildRequires: libffi-devel
 BuildRequires: libgcc
 BuildRequires: libglib-devel
 BuildRequires: libglibmm-devel
 BuildRequires: libicu-devel
+BuildRequires: liblz4-devel
 BuildRequires: liblzma-devel
-BuildRequires: libnettle-devel
 BuildRequires: libopenssl-devel
-BuildRequires: libpcre-devel
 BuildRequires: libsigc++-devel
 BuildRequires: libstdc++6-devel
 BuildRequires: libxml++2-devel
@@ -48,8 +47,7 @@ This package contains shared libraries for %{name}.
 Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      libhfstospell = %{?epoch:%epoch:}%{version}-%{release}
-## note: you can add this requirement if .pc files are provided by this package
-#Requires:      pkg-config
+Requires:      pkg-config
 
 %description -n libhfstospell-devel
 This package contains libraries and header files for developing applications that use %{name}.
@@ -59,9 +57,9 @@ This package contains libraries and header files for developing applications tha
 
 %prep
 %setup -q
+./autogen.sh
 
 %build
-./autogen.sh
 %configure
 %make
 
@@ -97,5 +95,8 @@ This package contains libraries and header files for developing applications tha
 %doc ChangeLog ChangeLog.old NEWS README
 
 %changelog
+* Fri Dec 18 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.2-1mamba
+- update to 0.5.2
+
 * Thu Apr 25 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.1-1mamba
 - package created using the webbuild interface