diff --git a/ocaml-luv.spec b/ocaml-luv.spec
index 6ed536f..7538160 100644
--- a/ocaml-luv.spec
+++ b/ocaml-luv.spec
@@ -2,7 +2,7 @@
 
 Name:          ocaml-luv
 Version:       0.5.11
-Release:       2mamba
+Release:       3mamba
 Summary:       Cross-platform asynchronous I/O and system calls
 Group:         System/Libraries/OCaml
 Vendor:        openmamba
@@ -23,7 +23,7 @@ BuildRequires: ocaml-result
 BuildRequires: dune
 BuildRequires: ocaml
 BuildRequires: ocaml-findlib
-BuildRequires: ocaml-ctypes-devel >= 0.20.0-2mamba
+BuildRequires: ocaml-ctypes-devel >= 0.20.1
 
 %description
 %{summary}.
@@ -84,6 +84,9 @@ rm -rf %{buildroot}/usr/doc
 %doc README.md
 
 %changelog
+* Sat May 14 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.11-3mamba
+- rebuild with ocaml-ctypes 0.20.1
+
 * Wed Feb 09 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 0.5.11-2mamba
 - rebuilt with ocaml-ctypes 0.20.0-2mamba