diff --git a/dev-python/seqdiag/Manifest b/dev-python/seqdiag/Manifest
index 89e919d..bdb6be2 100644
--- a/dev-python/seqdiag/Manifest
+++ b/dev-python/seqdiag/Manifest
@@ -1,2 +1,3 @@
 DIST seqdiag-0.9.6.tar.gz 2619777 BLAKE2B 7c41c8103ddd64261d98f333a403c138a3e113ed704d1e4c36473ca74ccc4b93879020bc275de13596301109637ff07a4f8774d71c16b13d9344e791dd89a990 SHA512 2928612239f155d66f3c4a613092fc7cddb5b58f7c0ac8ad52a6c2d8647fc972d1675e4a307690ccdd0b60ff0578e062a213849a7804cd30b8fd66b63fd8abfb
 DIST seqdiag-2.0.0.tar.gz 2619184 BLAKE2B 7804eb7b9d9626e6e8db0ec4b099c8f8675c7bedbe7bc8dd6fa0955263663fe997d628a71212a3f49c76d6441ecb5927ef7b3454a1e4ee0e0ec5e92ce4c59fa3 SHA512 944fbacffefb496a3ac4959af7681122f686b9a5d4a019659128c8b999314e52860068474c67265c328f31fd3e750f3d2e3e7c633c50f5d4bcbe1880feb94804
+DIST seqdiag-3.0.0.tar.gz 2619076 BLAKE2B 9c455ef54d0caf80b94f1b1cda23b411e01da204160c9f01f78c326ff857faea9170a0a33ea7724e77b86f812bed1694db29bd0bf72eae95a5e9182fc8caa5a8 SHA512 b98a7056abc9941fe88fec5e58d07fa76b027d24204a0b072aa15690d557303589fb2bffed59f6be1b58c8bdadac9cac3e75e427e027bc815a82e97be9570e22
diff --git a/dev-python/seqdiag/seqdiag-3.0.0.ebuild b/dev-python/seqdiag/seqdiag-3.0.0.ebuild
new file mode 100644
index 0000000..9e16aa9
--- /dev/null
+++ b/dev-python/seqdiag/seqdiag-3.0.0.ebuild
@@ -0,0 +1,21 @@
+# Copyright 2020-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..10} )
+inherit distutils-r1
+
+DESCRIPTION="seqdiag generate sequence-diagram image file from spec-text file."
+HOMEPAGE="http://blockdiag.com/en/"
+SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE=""
+
+DEPEND="dev-python/funcparserlib
+dev-python/blockdiag"
+RDEPEND="${DEPEND}"
+BDEPEND=""