diff --git a/ocaml-ffmpeg-1.1.9-ffmpeg-6.1.1.patch b/ocaml-ffmpeg-1.1.9-ffmpeg-6.1.1.patch
new file mode 100644
index 0000000..a6c2ce9
--- /dev/null
+++ b/ocaml-ffmpeg-1.1.9-ffmpeg-6.1.1.patch
@@ -0,0 +1,10 @@
+--- ocaml-ffmpeg-1.1.9/examples/all_codecs.ml.orig	2024-01-10 10:51:37.935174153 +0100
++++ ocaml-ffmpeg-1.1.9/examples/all_codecs.ml	2024-01-10 10:51:56.816206897 +0100
+@@ -5,6 +5,7 @@
+   | `Reorder -> "Reorder"
+   | `Bitmap_sub -> "Bitmap sub"
+   | `Text_sub -> "Text sub"
++  | `Fields -> "Fields"
+ 
+ let string_of_media_type = function
+   | `Unknown -> "unknown"
diff --git a/ocaml-ffmpeg.spec b/ocaml-ffmpeg.spec
index fe9c355..a06ae88 100644
--- a/ocaml-ffmpeg.spec
+++ b/ocaml-ffmpeg.spec
@@ -3,7 +3,7 @@
 
 Name:          ocaml-ffmpeg
 Version:       1.1.9
-Release:       1mamba
+Release:       2mamba
 Summary:       OCaml bindings to the FFmpeg library
 Group:         Development/Bindings
 Vendor:        openmamba
@@ -11,6 +11,7 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://github.com/savonet/ocaml-ffmpeg
 Source:        https://github.com/savonet/ocaml-ffmpeg.git/v%{version}/ocaml-ffmpeg-%{version}.tar.bz2
+Patch0:        ocaml-ffmpeg-1.1.9-ffmpeg-6.1.1.patch
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -24,6 +25,13 @@ BuildRequires: libswscale-ffmpeg-devel
 BuildRequires: ocaml-runtime
 ## AUTOBUILDREQ-END
 BuildRequires: ocaml >= 4.14.1
+BuildRequires: libavcodec-ffmpeg-devel >= 2:6.1.1
+BuildRequires: libavdevice-ffmpeg-devel >= 2:6.1.1
+BuildRequires: libavfilter-ffmpeg-devel >= 2:6.1.1
+BuildRequires: libavformat-ffmpeg-devel >= 2:6.1.1
+BuildRequires: libavutil-ffmpeg-devel >= 2:6.1.1
+BuildRequires: libswresample-ffmpeg-devel >= 2:6.1.1
+BuildRequires: libswscale-ffmpeg-devel >= 2:6.1.1
 
 %description
 OCaml bindings to the FFmpeg library.
@@ -40,6 +48,7 @@ This package contains libraries and signature files for developing applications
 
 %prep
 %setup -q
+%patch 0 -p1
 
 %build
 dune build
@@ -78,6 +87,9 @@ rm -rf %{buildroot}/usr/doc
 %doc CHANGES README.md
 
 %changelog
+* Wed Jan 10 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.9-2mamba
+- rebuilt with ffmpeg 2:6.1.1
+
 * Tue Dec 26 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.9-1mamba
 - update to 1.1.9