diff --git a/dev-ml/uri/files/uri-4.2.0-ounit2.patch b/dev-ml/uri/files/uri-4.2.0-ounit2.patch
new file mode 100644
index 0000000000..6703ce1d3c
--- /dev/null
+++ b/dev-ml/uri/files/uri-4.2.0-ounit2.patch
@@ -0,0 +1,95 @@
+From 73e4b497b3afa6530fabb1d445d0d4285fa302b5 Mon Sep 17 00:00:00 2001
+From: Alessandro Barbieri <lssndrbarbieri@gmail.com>
+Date: Sat, 16 Apr 2022 15:16:33 +0200
+Subject: [PATCH 1/4] use ounit2
+
+---
+ lib_test/dune | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/lib_test/dune b/lib_test/dune
+index ba44355..f61938d 100644
+--- a/lib_test/dune
++++ b/lib_test/dune
+@@ -2,10 +2,10 @@
+  (name test_runner)
+  (package uri)
+  (modules test_runner)
+- (libraries uri uri.services oUnit))
++ (libraries uri uri.services ounit2))
+ 
+ (test
+  (name test_runner_sexp)
+  (package uri-sexp)
+  (modules test_runner_sexp)
+- (libraries uri uri.services uri-sexp oUnit))
++ (libraries uri uri.services uri-sexp ounit2))
+
+From e40a51aec751ff397c94cbde8faa7fc01141a281 Mon Sep 17 00:00:00 2001
+From: Alessandro Barbieri <lssndrbarbieri@gmail.com>
+Date: Sat, 16 Apr 2022 15:17:15 +0200
+Subject: [PATCH 2/4] depend on ounit2
+
+---
+ uri-sexp.opam | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/uri-sexp.opam b/uri-sexp.opam
+index d4b2e44..fb249a5 100644
+--- a/uri-sexp.opam
++++ b/uri-sexp.opam
+@@ -16,7 +16,7 @@ depends: [
+   "dune" {>= "1.2.0"}
+   "ppx_sexp_conv" {>= "v0.13.0"}
+   "sexplib0"
+-  "ounit" {with-test}
++  "ounit2" {with-test}
+ ]
+ build: [
+   ["dune" "subst"] {pinned}
+
+From 2615ace2358efc166f49b6dbc7167232086cadde Mon Sep 17 00:00:00 2001
+From: Alessandro Barbieri <lssndrbarbieri@gmail.com>
+Date: Sat, 16 Apr 2022 15:17:48 +0200
+Subject: [PATCH 3/4] depend on ounit2
+
+---
+ uri-re.opam | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/uri-re.opam b/uri-re.opam
+index 3d525a0..3d34e3e 100644
+--- a/uri-re.opam
++++ b/uri-re.opam
+@@ -15,7 +15,7 @@ for parsing URI or URLs.
+ depends: [
+   "ocaml" {>= "4.04.0"}
+   "dune" {>= "1.2.0"}
+-  "ounit" {with-test & >= "1.0.2"}
++  "ounit2" {with-test & >= "1.0.2"}
+   "ppx_sexp_conv" {with-test & >= "v0.9.0"}
+   "re" {>= "1.9.0"}
+   "stringext" {>= "1.4.0"}
+
+From a3b57ec4b8582b73b49bd95c163b44b885fe582f Mon Sep 17 00:00:00 2001
+From: Alessandro Barbieri <lssndrbarbieri@gmail.com>
+Date: Sat, 16 Apr 2022 15:18:10 +0200
+Subject: [PATCH 4/4] depend on ounit2
+
+---
+ uri.opam | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/uri.opam b/uri.opam
+index ab1cbf6..78d08b0 100644
+--- a/uri.opam
++++ b/uri.opam
+@@ -15,7 +15,7 @@ for parsing URI or URLs.
+ depends: [
+   "ocaml" {>= "4.04.0"}
+   "dune" {>= "1.2.0"}
+-  "ounit" {with-test & >= "1.0.2"}
++  "ounit2" {with-test & >= "1.0.2"}
+   "ppx_sexp_conv" {with-test & >= "v0.9.0"}
+   "stringext" {>= "1.4.0"}
+   "angstrom" {>= "0.14.0"}
diff --git a/dev-ml/uri/uri-4.2.0.ebuild b/dev-ml/uri/uri-4.2.0.ebuild
index afff9437d7..4f5d62e814 100644
--- a/dev-ml/uri/uri-4.2.0.ebuild
+++ b/dev-ml/uri/uri-4.2.0.ebuild
@@ -6,7 +6,10 @@ EAPI=8
 inherit dune multiprocessing
 
 DESCRIPTION="RFC3986 URI parsing library for OCaml"
-HOMEPAGE="https://github.com/mirage/ocaml-uri"
+HOMEPAGE="
+	https://github.com/mirage/ocaml-uri
+	https://opam.ocaml.org/packages/uri/
+"
 SRC_URI="https://github.com/mirage/ocaml-uri/archive/v${PV}.tar.gz -> ocaml-${P}.tar.gz"
 S="${WORKDIR}/ocaml-${P}"
 
@@ -16,26 +19,25 @@ KEYWORDS="~amd64"
 IUSE="ocamlopt re sexp test"
 
 RDEPEND="
-	dev-ml/angstrom
-	dev-ml/stringext
+	>=dev-ml/angstrom-0.14.0:=
+	>=dev-ml/stringext-1.4.0:=
 
-	re? (
-		dev-ml/re
-	)
+	re? ( >=dev-ml/re-1.9.0:= )
 	sexp? (
-		dev-ml/ppx_sexp_conv
-		dev-ml/sexplib0
+		>=dev-ml/ppx_sexp_conv-0.13.0:=
+		dev-ml/sexplib0:=
 	)
 "
 DEPEND="
 	${RDEPEND}
 	test? (
-		dev-ml/ounit
-		dev-ml/ppx_sexp_conv
+		dev-ml/ounit2
+		>=dev-ml/ppx_sexp_conv-0.9.0
 	)
 "
 
 RESTRICT="!test? ( test )"
+PATCHES="${FILESDIR}/${P}-ounit2.patch"
 
 src_compile() {
 	local pkgs="uri"