diff --git a/fileutils-0.5.2-fix-bytes.patch b/fileutils-0.5.2-fix-bytes.patch
deleted file mode 100644
index cd0011d..0000000
--- a/fileutils-0.5.2-fix-bytes.patch
+++ /dev/null
@@ -1,20 +0,0 @@
---- ocaml-fileutils-0.5.2.old/src/FileUtilCP.ml	2017-05-23 21:12:19.000000000 +0100
-+++ ocaml-fileutils-0.5.2/src/FileUtilCP.ml	2017-11-08 17:36:42.271524209 +0000
-@@ -138,7 +138,7 @@
-     end
-   in
- 
--  let buffer = String.make 1024 ' ' in
-+  let buffer = Bytes.make 1024 ' ' in
- 
-   let cp_file st_src dst_exists fn_src fn_dst =
-     let mode = int_of_permission st_src.permission in
-@@ -176,7 +176,7 @@
-           try
-             while (read :=
-                    handle_exception
--                     (Unix.read fd_src buffer 0) (String.length buffer)
-+                     (Unix.read fd_src buffer 0) (Bytes.length buffer)
-                      (fun e -> `ErrorRead(fn_src, e));
-                    !read <> 0) do
-               let written =
diff --git a/fileutils-0.6.4.tbz b/fileutils-0.6.4.tbz
new file mode 100644
index 0000000..7666b63
Binary files /dev/null and b/fileutils-0.6.4.tbz differ
diff --git a/ocaml-fileutils-0.5.2.tar.gz b/ocaml-fileutils-0.5.2.tar.gz
deleted file mode 100644
index 7f62042..0000000
Binary files a/ocaml-fileutils-0.5.2.tar.gz and /dev/null differ
diff --git a/ocaml-fileutils-0.6.4-cmp.patch b/ocaml-fileutils-0.6.4-cmp.patch
new file mode 100644
index 0000000..a966e28
--- /dev/null
+++ b/ocaml-fileutils-0.6.4-cmp.patch
@@ -0,0 +1,18 @@
+--- fileutils-0.6.4/src/lib/fileutils/FileUtilCMP.ml.orig	2022-10-28 14:22:35.000000000 -0600
++++ fileutils-0.6.4/src/lib/fileutils/FileUtilCMP.ml	2023-06-22 15:04:21.317130686 -0600
+@@ -48,11 +48,14 @@ let cmp ?(skip1 = 0) fln1 ?(skip2 = 0) f
+     let rec loop count s1 s2 =
+       match s1, s2 with
+       | Seq.Cons (v1, s1), Seq.Cons (v2, s2) when v1 = v2 -> loop (count + 1) (s1 ()) (s2 ())
++      | Seq.Nil, Seq.Nil -> (-1)
+       | _ -> count
+     in
+     let count = loop 0 (stream1 ()) (stream2 ()) in
+     clean_fd ();
+-    Some count
++    match count with
++    | (-1) -> None
++    | x -> Some x
+   end else
+     Some (-1)
+ 
diff --git a/ocaml-fileutils-0.6.4-forward-compat.patch b/ocaml-fileutils-0.6.4-forward-compat.patch
new file mode 100644
index 0000000..2b1e084
--- /dev/null
+++ b/ocaml-fileutils-0.6.4-forward-compat.patch
@@ -0,0 +1,27 @@
+--- fileutils-0.6.4/fileutils.opam.orig	2022-10-28 14:22:35.000000000 -0600
++++ fileutils-0.6.4/fileutils.opam	2023-06-22 13:01:26.779533940 -0600
+@@ -16,8 +16,6 @@ build: [
+ depends: [
+   "ocaml" {>= "4.03"}
+   "base-unix"
+-  "stdlib-shims"
+-  "seq"
+   "dune" {>= "1.11.0"}
+   "ounit2" {with-test & >= "2.0.0"}
+ ]
+--- fileutils-0.6.4/src/lib/fileutils/dune.orig	2022-10-28 14:22:35.000000000 -0600
++++ fileutils-0.6.4/src/lib/fileutils/dune	2023-06-22 13:01:47.403222843 -0600
+@@ -30,4 +30,4 @@
+     fileUtilWHICH
+     unixPath
+     win32Path)
+-  (libraries unix seq stdlib-shims))
++  (libraries unix))
+--- fileutils-0.6.4/test/dune.orig	2022-10-28 14:22:35.000000000 -0600
++++ fileutils-0.6.4/test/dune	2023-06-22 13:02:04.739961336 -0600
+@@ -6,4 +6,4 @@
+ (test
+   (name test)
+   (modules test)
+-  (libraries fileutils fileutils_str ounit2 stdlib-shims))
++  (libraries fileutils fileutils_str ounit2))
diff --git a/ocaml-fileutils.spec b/ocaml-fileutils.spec
index 8d09624..482f7fd 100644
--- a/ocaml-fileutils.spec
+++ b/ocaml-fileutils.spec
@@ -1,15 +1,15 @@
 Name:           ocaml-fileutils
-Version:        0.5.2
-Release:        7
+Version:        0.6.4
+Release:        1
 Summary:        API to manipulate files (POSIX like) and filenames
 License:        LGPLv2 with exceptions
 URL:            https://github.com/gildor478/ocaml-fileutils
-Source0:        https://download.ocamlcore.org/%{name}/%{name}/%{version}/%{name}-%{version}.tar.gz
+Source0:        https://github.com/gildor478/ocaml-fileutils/releases/download/v%{version}/fileutils-%{version}.tbz
+Patch0000:      ocaml-fileutils-0.6.4-forward-compat.patch
+Patch0001:      ocaml-fileutils-0.6.4-cmp.patch
 
-Patch0001:      fileutils-0.5.2-fix-bytes.patch
-
-BuildRequires:  ocaml >= 4.00.1 ocaml-findlib-devel >= 1.3.3-3
-BuildRequires:  ocaml-ocamlbuild ocaml-ocamldoc ocaml-ounit-devel
+BuildRequires:  ocaml >= 4.00.1  ocaml-dune
+BuildRequires:  ocaml-ounit-devel
 
 %description
 This library provides an API to perform POSIX like operations on files like:
@@ -34,23 +34,23 @@ The package provides libraries and some other development documents for developi
 that use %{name}.
 
 %prep
-%autosetup -p1
+%autosetup -n fileutils-%{version} -p1
+sed -i 's/ounit2/ounit/g' fileutils.opam
+sed -i 's/ounit2/oUnit/g' test/dune
 
 %build
-ocaml setup.ml -configure --destdir $RPM_BUILD_ROOT --prefix %{_prefix} --enable-tests
-make
+dune build --verbose --release %{?_smp_mflags}
 
 %install
-export DESTDIR=$RPM_BUILD_ROOT OCAMLFIND_DESTDIR=$RPM_BUILD_ROOT%{_libdir}/ocaml
-install -d $OCAMLFIND_DESTDIR/stublibs
-
-make htmldir=. install
+dune install --destdir=%{buildroot}  --verbose --release %{?_smp_mflags}
+rm -rf %{buildroot}/usr/doc
 
 %check
-make test
+dune runtest --verbose --release %{?_smp_mflags}
 
 %files
-%doc AUTHORS.txt CHANGELOG.txt COPYING.txt README.txt TODO.txt
+%license LICENSE.txt
+%doc README.md CHANGES.md
 %{_libdir}/ocaml/fileutils
 %exclude %{_libdir}/ocaml/fileutils/*.{a,cmx,cmxa,ml,mli}
 
@@ -58,6 +58,9 @@ make test
 %{_libdir}/ocaml/fileutils/*.{a,cmx,cmxa,ml,mli}
 
 %changelog
+* Thu Sep 21 2023 liyanan <thistleslyn@163.com> - 0.6.4-1
+- update to 0.6.4
+
 * Tue Nov 22 2022 xu_ping<xu_ping33@h-partners.com> - 0.5.2-7
 - Modify invalid source
 
diff --git a/ocaml-fileutils.yaml b/ocaml-fileutils.yaml
new file mode 100644
index 0000000..2d5ec54
--- /dev/null
+++ b/ocaml-fileutils.yaml
@@ -0,0 +1,4 @@
+version_control: github
+src_repo: gildor478/ocaml-fileutils
+tag_prefix: "^v"
+separator: .