diff --git a/README.md b/README.md
index 0f9ca26..09c2d50 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
 # ocaml-ctypes
 
 Combinators for binding to C libraries without writing any C.
+
diff --git a/ocaml-ctypes.spec b/ocaml-ctypes.spec
index bf3e919..8030353 100644
--- a/ocaml-ctypes.spec
+++ b/ocaml-ctypes.spec
@@ -2,8 +2,8 @@
 %define ocamlpck  ctypes
 
 Name:          ocaml-ctypes
-Version:       0.17.1
-Release:       3mamba
+Version:       0.20.0
+Release:       2mamba
 Summary:       Combinators for binding to C libraries without writing any C
 Group:         System/Libraries/OCaml
 Vendor:        openmamba
@@ -16,20 +16,22 @@ License:       BSD
 BuildRequires: glibc-devel
 BuildRequires: libffi-devel
 BuildRequires: ocaml
+BuildRequires: ocaml-bigarray-compat-devel
+BuildRequires: ocaml-compiler-libs
 BuildRequires: ocaml-integers
 BuildRequires: ocaml-runtime
 ## AUTOBUILDREQ-END
 BuildRequires: ocaml
 BuildRequires: ocaml-camlp4-devel
 BuildRequires: ocaml-findlib
-BuildRequires: ocaml-integers >= 0.4.0
+BuildRequires: ocaml-integers >= 0.6.0
 BuildRequires: ocaml >= 4.11.1
+BuildRequires: ocaml-bigarray-compat-devel
 Requires:      ocaml-runtime
 
 %description
 Combinators for binding to C libraries without writing any C.
 
-## remove the following two blocks if there's no devel files
 %package devel
 Group:         Development/Libraries/OCaml
 Summary:       Development files for %{name}
@@ -38,6 +40,8 @@ Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 %description devel
 This package contains libraries and signature files for developing applications that use %{name}.
 
+%debug_package
+
 %prep
 %setup -q
 
@@ -66,7 +70,7 @@ make install
 %{_libdir}/ocaml/%{ocamlpck}/*.cmi
 %{_libdir}/ocaml/%{ocamlpck}/*.cmxs
 %{_libdir}/ocaml/stublibs/*.so*
-#%doc COPYING
+%doc LICENSE
 
 %files devel
 %defattr(-,root,root)
@@ -78,9 +82,15 @@ make install
 %{_libdir}/ocaml/%{ocamlpck}/*.cmx
 %{_libdir}/ocaml/%{ocamlpck}/*.cmxa
 %{_libdir}/ocaml/%{ocamlpck}/*.mli
-# %doc CHANGES README
+%doc CHANGES.md README.md
 
 %changelog
+* Wed Feb 09 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.20.0-2mamba
+- rebuilt with ocaml integers 0.6.0
+
+* Sun Jan 30 2022 Automatic Build System <autodist@mambasoft.it> 0.20.0-1mamba
+- automatic version update by autodist
+
 * Thu Apr 22 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 0.17.1-3mamba
 - rebuilt with new ocamlx deps