diff --git a/dev-python/numcodecs/Manifest b/dev-python/numcodecs/Manifest
index b14e3311b9d..611e6d1be37 100644
--- a/dev-python/numcodecs/Manifest
+++ b/dev-python/numcodecs/Manifest
@@ -1,2 +1 @@
-DIST numcodecs-0.11.0.tar.gz 4512454 BLAKE2B 8144120856437ca272e275430c6e169d3e2a88c12c54f71518a7f262a77f13161f61e36b8da75abc0ab4efc02cf0807e86272c1bcf5e21bfb76fba7c4cbc8863 SHA512 cd0bcd87320e3c5a4cc97f8b6b11062361ce007c55bf23d07afab7a85df256bf7bc3f16d49958e9238901e70b26deb90faaa7a006207b6325fdbe225b99139d2
-DIST numcodecs-0.12.1.tar.gz 4091415 BLAKE2B d7fa8cc549495c7c54130898f2047eb409559541b299640fb34a2332d874049afa64d5c14151426b24a1ab04c0e0444245477aa26f9336ce3ba7aefc8043abcf SHA512 716a1144c17b08cc1737bd429517b5434a7e5dbc9626ed613ca9ab4f9cda356ed97cb4ef0e2bba747a7681dc5b43818cb07c6db7f5537b4910790f6ea23c696c
+DIST numcodecs-0.13.0.tar.gz 5922216 BLAKE2B fbbdce2fdc2d3ae16afa7770c04330f21061436de3f1e09730d481e5bcfd3a2987717e7139049184824c690ff31e701b834a3757dc1b2e7ad62211795618664c SHA512 3a5f5d00374ff7e5efcac35b520ef92ace23f766983ac23e94cf69be0c2583e08849bdebd7f477b758692636ccbddf19cddd6c2462c29bec22f0c15f7341766c
diff --git a/dev-python/numcodecs/numcodecs-0.11.0.ebuild b/dev-python/numcodecs/numcodecs-0.11.0.ebuild
deleted file mode 100644
index 500a52b897f..00000000000
--- a/dev-python/numcodecs/numcodecs-0.11.0.ebuild
+++ /dev/null
@@ -1,49 +0,0 @@
-# Copyright 1999-2023 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=8
-
-PYTHON_COMPAT=( python3_{10..11} )
-DISTUTILS_USE_PEP517=setuptools
-inherit distutils-r1 pypi
-
-DESCRIPTION="Data storage buffer compression and transformation codecs"
-HOMEPAGE="https://github.com/zarr-developers/numcodecs"
-
-LICENSE="MIT"
-SLOT="0"
-KEYWORDS="~amd64 ~x86"
-IUSE="test"
-
-RDEPEND="
-	dev-python/cython[${PYTHON_USEDEP}]
-	dev-python/entrypoints[${PYTHON_USEDEP}]
-	dev-python/msgpack[${PYTHON_USEDEP}]
-	dev-python/numpy[${PYTHON_USEDEP}]
-	dev-python/py-cpuinfo[${PYTHON_USEDEP}]
-"
-
-DEPEND="
-	test? (
-		${RDEPEND}
-		dev-python/entrypoints[${PYTHON_USEDEP}]
-	)
-"
-
-PATCHES=(
-	"${FILESDIR}/${P}-nocov.patch"
-)
-
-# Reported upstream:
-# https://github.com/zarr-developers/numcodecs/issues/436
-EPYTEST_DESELECT=(
-	tests/test_json.py::test_non_numpy_inputs
-	tests/test_msgpacks.py::test_non_numpy_inputs
-)
-
-distutils_enable_tests pytest
-
-python_test() {
-	cd "${T}" || die
-	epytest --pyargs numcodecs
-}
diff --git a/dev-python/numcodecs/numcodecs-0.12.1-r2.ebuild b/dev-python/numcodecs/numcodecs-0.13.0.ebuild
similarity index 56%
rename from dev-python/numcodecs/numcodecs-0.12.1-r2.ebuild
rename to dev-python/numcodecs/numcodecs-0.13.0.ebuild
index 3d20684ba64..6665aa2a101 100644
--- a/dev-python/numcodecs/numcodecs-0.12.1-r2.ebuild
+++ b/dev-python/numcodecs/numcodecs-0.13.0.ebuild
@@ -1,11 +1,13 @@
-# Copyright 1999-2023 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
 
-PYTHON_COMPAT=( python3_{10..11} )
+PYTHON_COMPAT=( python3_{10..12} )
+DISTUTILS_EXT=1
 DISTUTILS_USE_PEP517=setuptools
-inherit distutils-r1 pypi
+
+inherit distutils-r1 pypi flag-o-matic
 
 DESCRIPTION="Data storage buffer compression and transformation codecs"
 HOMEPAGE="https://github.com/zarr-developers/numcodecs"
@@ -24,19 +26,29 @@ RDEPEND="
 "
 DEPEND="
 	test? (
-		${RDEPEND}
 		dev-python/entrypoints[${PYTHON_USEDEP}]
 	)
 "
 
-distutils_enable_tests pytest
-
 python_compile() {
-	local -x DISABLE_NUMCODECS_AVX2=1
-	local -x DISABLE_NUMCODECS_SSE2=1
+	# undefined symbols upon zstd shared lib import otherwise
+	filter-flags -pipe
 	distutils-r1_python_compile
 }
 
+EPYTEST_DESELECT=(
+	# python segfault
+	tests/test_blosc.py::test_encode_decode
+	tests/test_blosc.py::test_partial_decode
+	tests/test_blosc.py::test_compress_metainfo
+	tests/test_blosc.py::test_compress_autoshuffle
+	tests/test_blosc.py::test_multiprocessing
+	tests/test_blosc.py::test_backwards_compatibility
+	tests/test_blosc.py::test_max_buffer_size
+)
+
+distutils_enable_tests pytest
+
 python_test() {
 	cd "${T}" || die
 	epytest --pyargs numcodecs