diff --git a/ocaml-sedlex-uchar.patch b/ocaml-sedlex-uchar.patch
new file mode 100644
index 0000000..7eb82e3
--- /dev/null
+++ b/ocaml-sedlex-uchar.patch
@@ -0,0 +1,28 @@
+--- a/dune-project	2021-07-31 00:53:24.000000000 -0600
++++ b/dune-project	2021-09-01 10:35:54.195593680 -0600
+@@ -21,5 +21,4 @@ extension.")
+    (ocaml (>= 4.04))
+    dune
+    (ppxlib (>= 0.18.0))
+-   gen
+-   uchar))
++   gen))
+--- a/sedlex.opam	2021-07-31 00:53:24.000000000 -0600
++++ b/sedlex.opam	2021-09-01 10:36:10.123626201 -0600
+@@ -20,7 +20,6 @@ depends: [
+   "dune" {>= "2.8"}
+   "ppxlib" {>= "0.18.0"}
+   "gen"
+-  "uchar"
+   "odoc" {with-doc}
+ ]
+ build: [
+--- a/src/lib/dune	2021-07-31 00:53:24.000000000 -0600
++++ b/src/lib/dune	2021-09-01 10:35:25.851535799 -0600
+@@ -2,5 +2,5 @@
+  (name sedlex)
+  (public_name sedlex)
+  (wrapped false)
+- (libraries gen uchar)
++ (libraries gen)
+  (flags :standard -w +A-4-9 -safe-string))
diff --git a/ocaml-sedlex.spec b/ocaml-sedlex.spec
index 3d93093..5fabf0a 100644
--- a/ocaml-sedlex.spec
+++ b/ocaml-sedlex.spec
@@ -1,6 +1,6 @@
 Name:           ocaml-sedlex
-Version:        2.3
-Release:        5%{?dist}
+Version:        2.4
+Release:        1%{?dist}
 Summary:        Unicode-friendly lexer generator
 
 License:        MIT
@@ -10,6 +10,9 @@ Source0:        https://github.com/ocaml-community/sedlex/archive/v%{version}/%{
 # Use local Unicode files instead of attempting to download them
 Patch0:         %{name}-no-curl.patch
 
+# Do not depend on the uchar compatibility package; our OCaml is new enough
+Patch1:         %{name}-uchar.patch
+
 BuildRequires:  ocaml
 BuildRequires:  ocaml-dune
 BuildRequires:  ocaml-odoc
@@ -38,12 +41,14 @@ files for developing applications that use %{name}.
 %prep
 %autosetup -p1 -n sedlex-%{version}
 
-# Upstream's regression test is written for Unicode 6.3.0 through 12.1.0.  Our
+if false; then
+# Upstream's regression test is written for Unicode 6.3.0 through 13.0.0.  Our
 # Unicode files are from a more recent version of the standard.  The test has a
 # good chance of succeeding anyway, so we cross our fingers and give it a try.
 # If the regression test fails, we'll have to try another approach.
 univer=$(sed -n 's/.*PropList-\([.[:digit:]]*\)\.txt/\1/p' %{_datadir}/unicode/ucd/PropList.txt)
-sed -i "s/12\\.1\\.0/$univer/" examples/regressions.ml
+sed -i "s/13\\.0\\.0/$univer/" examples/regressions.ml
+fi
 
 %build
 dune build %{?_smp_mflags} -p sedlex --verbose
@@ -55,14 +60,6 @@ dune install --destdir="$RPM_BUILD_ROOT" --verbose
 # These will be installed using doc and license directives.
 rm -r $RPM_BUILD_ROOT%{_prefix}/doc/sedlex/{CHANGES,README.md,LICENSE}
 
-# Makes *.opt executable such that they will be stripped.
-find $RPM_BUILD_ROOT -name '*.opt' -exec chmod 0755 {} \;
-
-# uchar is a compatibility package for older OCaml version
-sed -i 's/uchar//g' $RPM_BUILD_ROOT%{_libdir}/ocaml/sedlex/META
-sed -i 's/uchar//g' $RPM_BUILD_ROOT%{_libdir}/ocaml/sedlex/dune-package
-sed -i 's/"uchar"//g' $RPM_BUILD_ROOT%{_libdir}/ocaml/sedlex/opam
-
 
 %check
 dune runtest
@@ -90,6 +87,10 @@ dune runtest
 
 
 %changelog
+* Wed Sep  1 2021 Jerry James <loganjerry@gmail.com> - 2.4-1
+- Version 2.4
+- Add -uchar patch to avoid the need for a compatibility package
+
 * Thu Jul 29 2021 Jerry James <loganjerry@gmail.com> - 2.3-5
 - Rebuild for ocaml-ppxlib 0.22.2
 
diff --git a/sources b/sources
index 73aadb7..1c1627b 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (ocaml-sedlex-2.3.tar.gz) = f91bbda9e79417e0a7c723a8efd9644404ffc91c60898b8fa07a514c38bc8472eae34419405354ae80966feb8d3203943f78776ad395a16132c7c890e3dbd7d8
+SHA512 (ocaml-sedlex-2.4.tar.gz) = 848a06517c89d40a8162c2d06d2ff3197de5aae5f22345f8f172183f8cf4d728406cc0e3f94365170a9d6167dc083973b4e4a4683871693138c8e82df7877b5f