diff --git a/ocaml-luv.spec b/ocaml-luv.spec
index 37422a8..6ed536f 100644
--- a/ocaml-luv.spec
+++ b/ocaml-luv.spec
@@ -2,19 +2,20 @@
 
 Name:          ocaml-luv
 Version:       0.5.11
-Release:       1mamba
+Release:       2mamba
 Summary:       Cross-platform asynchronous I/O and system calls
 Group:         System/Libraries/OCaml
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           https://aantron.github.io/luv
+URL:           https://aantron.github.io/luv/
 Source:        https://github.com/aantron/luv.git/%{version}/luv-%{version}.tar.bz2
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 BuildRequires: libuv-devel
 BuildRequires: ocaml
+BuildRequires: ocaml-bigarray-compat-devel
 BuildRequires: ocaml-ctypes-devel
 BuildRequires: ocaml-integers
 BuildRequires: ocaml-result
@@ -22,6 +23,7 @@ BuildRequires: ocaml-result
 BuildRequires: dune
 BuildRequires: ocaml
 BuildRequires: ocaml-findlib
+BuildRequires: ocaml-ctypes-devel >= 0.20.0-2mamba
 
 %description
 %{summary}.
@@ -82,5 +84,8 @@ rm -rf %{buildroot}/usr/doc
 %doc README.md
 
 %changelog
+* Wed Feb 09 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.11-2mamba
+- rebuilt with ocaml-ctypes 0.20.0-2mamba
+
 * Sun Feb 06 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.11-1mamba
 - package created using the webbuild interface