diff --git a/dev-ml/yojson/Manifest b/dev-ml/yojson/Manifest
index d2bceff756be8..d6b44a7ba6030 100644
--- a/dev-ml/yojson/Manifest
+++ b/dev-ml/yojson/Manifest
@@ -1 +1,2 @@
 DIST yojson-2.2.2.tar.gz 58638 BLAKE2B b1e9e0375b57ad6a112aba25adda15cfc176ac44017c2dc686e5bfd3d32ed7c06c8bb1a97378f49b71f25b4949c836e3be5a72b06bfff76d96acd2b840ee43b9 SHA512 d1fdaa5345a37bb4ed203e8ec842bc8e91e88001de63c6e9539ef9c9f54b861af67de7d1169eb76879bab1a3b5b758dbc6deb1eea9cb6831bbbfba228b5bb4a3
+DIST yojson-3.0.0.gh.tar.gz 56689 BLAKE2B 716a7b1c7a8d219b6c216ba9ef2671375a5d6ce5a9c8f1f94db5681aeaabc8e9654eca8230b536301c2d761bb104e955b11f592bcb9094c0b87f89e64f2e767e SHA512 fb0cd16ac5d99196a341f8c9c80cccaafc0a5c04530d4024164f99dfe042f8050de5146e2ccf85316f13bf0533fe9def99627d7259725c0657d28bdc1914775a
diff --git a/dev-ml/yojson/yojson-3.0.0.ebuild b/dev-ml/yojson/yojson-3.0.0.ebuild
new file mode 100644
index 0000000000000..777a6ba6f7b8d
--- /dev/null
+++ b/dev-ml/yojson/yojson-3.0.0.ebuild
@@ -0,0 +1,53 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit dune
+
+DESCRIPTION="JSON parsing and pretty-printing library for OCaml"
+HOMEPAGE="https://github.com/ocaml-community/yojson/"
+
+if [[ "${PV}" == *9999* ]] ; then
+	inherit git-r3
+
+	EGIT_REPO_URI="https://github.com/ocaml-community/${PN}"
+else
+	SRC_URI="https://github.com/ocaml-community/${PN}/archive/${PV}.tar.gz
+		-> ${P}.gh.tar.gz"
+
+	KEYWORDS="~amd64 ~arm ~arm64 ~riscv ~x86"
+fi
+
+LICENSE="BSD"
+SLOT="0/${PV}"
+IUSE="examples +ocamlopt test"
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	test? ( dev-ml/alcotest )
+"
+
+src_prepare() {
+	default
+
+	# let's not build this
+	rm bench/dune yojson-bench.opam || die
+}
+
+src_compile() {
+	dune-compile "${PN}"
+}
+
+src_test() {
+	dune-test "${PN}"
+}
+
+src_install() {
+	dune_src_install
+
+	if use examples; then
+		dodoc -r examples
+		docompress -x /usr/share/doc/${PF}/examples
+	fi
+}