diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index ac15a9b3b..bf3e7febd 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -7,6 +7,7 @@
   * bump gogogate2-api-2.0.3
   * bump xknx-0.14.4
   * bump sentry-sdk-0.17.7, sentry-sdk-0.17.8
+  * bump isort-5.5.3
 
 2020-09-22
   * bump pyinsteon-1.0.8.ebuild
diff --git a/dev-python/isort/Manifest b/dev-python/isort/Manifest
index 4c6c03467..8868d43f4 100644
--- a/dev-python/isort/Manifest
+++ b/dev-python/isort/Manifest
@@ -1,7 +1,10 @@
 AUX isort-5.5.1-notest.patch 336 BLAKE2B e562c92e766231e295681f2ad8d6f172548a34a243a12339f9a7a7dbf66a1729fb09a8616bf4a751b4c0a946f94a66c910ba7e5e65c820cae60fc0f137b4de35 SHA512 5063197f7afe20c31f6171531a005ec09a02fb0eb8effdb7d3af7531076bf170280dbd1e74b6cb26f6742627f82070ba9b29aff9a5a23e7cae4aeb20c1a9ab3c
 AUX isort-5.5.2-notest.patch 336 BLAKE2B e562c92e766231e295681f2ad8d6f172548a34a243a12339f9a7a7dbf66a1729fb09a8616bf4a751b4c0a946f94a66c910ba7e5e65c820cae60fc0f137b4de35 SHA512 5063197f7afe20c31f6171531a005ec09a02fb0eb8effdb7d3af7531076bf170280dbd1e74b6cb26f6742627f82070ba9b29aff9a5a23e7cae4aeb20c1a9ab3c
+AUX isort-5.5.3-notest.patch 336 BLAKE2B e562c92e766231e295681f2ad8d6f172548a34a243a12339f9a7a7dbf66a1729fb09a8616bf4a751b4c0a946f94a66c910ba7e5e65c820cae60fc0f137b4de35 SHA512 5063197f7afe20c31f6171531a005ec09a02fb0eb8effdb7d3af7531076bf170280dbd1e74b6cb26f6742627f82070ba9b29aff9a5a23e7cae4aeb20c1a9ab3c
 DIST isort-5.5.1.tar.gz 144834 BLAKE2B 3cbc2611684787c9b2c4cfb71669d6ff9a0b379774c27bb6b1724e33b9c249e41ce2ab002dd29615bc40ff6b7f94ed1cba489ae8d6934172a81d191d217fd72b SHA512 f5e4ed0aededaa00bb0498e6ae23b8e65eb0429cbd1a63ddafc479d894a8e3241b880f4b9db0dea69a3dc793174f14603c45459a4f307f5c2cd5e315e09a7476
 DIST isort-5.5.2.tar.gz 145020 BLAKE2B 718c3e748333e17a29b19a46779c40b21a674efb3b3358851973f383719a64fda44ab352bd005e368e0bec3d5c20472c27dba8f0e62ef53c7fd80785a4cc0228 SHA512 687e523073b671f7144027ce05b388566809673ffa36bc5890a51eb38f3a85c40d9861e6d2ee70e70710725579fe63a28ca45c0a8bc902761ad02bfe4656e5d2
+DIST isort-5.5.3.tar.gz 145442 BLAKE2B 2f28f1ee82455f75dc59c372c80dd8ae1c85cee3652fbf8557bea262639d7428ff7cbca506126b63ba9a4e02d83d204416baef82618d8a53a70f90d97034e141 SHA512 ba787e30f4ec0b055c360a2cba00d7bbd26fdd4a500085db33043ee2a4e53eac08b5c14a8d451933dd3fe628821ba0e0599592605d52bcb540f1b581fab5d82e
 EBUILD isort-5.5.1.ebuild 734 BLAKE2B 145e1f551ac263628ea23a95062505f4d30cfc0a0175dd01c6f464fe6f64fc8f8365dce74494227f9645a93946ab4fde4df2bf20809ec6985eddb3316f6efd23 SHA512 2e84207908755f56d50ef0e84986d2e7288ee621ba930b352c253680f570f4d79d8568a6844862f31caeb96bc55c2c4b4e8b4b48b3812273fa75128a9bb8e7b7
 EBUILD isort-5.5.2.ebuild 778 BLAKE2B f5f81e272774d5ae58487df682c269a936220cd6ebc5f4725842b2212d557b113b2912d1b348ee9ba2e4808eddc9ce3b782456f86344a9d0a95d05210fd53e91 SHA512 b3af95f4d6fc73b253e8a0d3e60103613ca3c471dae430006186c3404e15a4efb0a2cf1d3884869731a1c30e36fc723fe1984c1ff7272b6a5b1558484ae34f45
+EBUILD isort-5.5.3.ebuild 778 BLAKE2B f5f81e272774d5ae58487df682c269a936220cd6ebc5f4725842b2212d557b113b2912d1b348ee9ba2e4808eddc9ce3b782456f86344a9d0a95d05210fd53e91 SHA512 b3af95f4d6fc73b253e8a0d3e60103613ca3c471dae430006186c3404e15a4efb0a2cf1d3884869731a1c30e36fc723fe1984c1ff7272b6a5b1558484ae34f45
 MISC metadata.xml 458 BLAKE2B c03a13ef442ebce39f40c5e0d4265a5a4ce1976166f1d692a4893485c5d4d2ac8e1911c383e8de514fc26a3ce7b67b70368181e8acffbde5e4c4fce36c0518a3 SHA512 05c9fd94e98a70121f6c59024844e12f5841ab22497107612c3980df52e31f5dd2468298a1051d5a6c4a53823afea28efd3773c9c388fdfd86bd2328ff8119d9
diff --git a/dev-python/isort/files/isort-5.5.3-notest.patch b/dev-python/isort/files/isort-5.5.3-notest.patch
new file mode 100644
index 000000000..25e3db79c
--- /dev/null
+++ b/dev-python/isort/files/isort-5.5.3-notest.patch
@@ -0,0 +1,17 @@
+diff --git a/setup.py b/setup.py
+index eef9a4b..fac99be 100644
+--- a/setup.py
++++ b/setup.py
+@@ -6,11 +6,7 @@ packages = \
+  'isort._future',
+  'isort._vendored.toml',
+  'isort.deprecated',
+- 'isort.stdlibs',
+- 'tests',
+- 'tests.integration',
+- 'tests.unit',
+- 'tests.unit.profiles']
++ 'isort.stdlibs']
+ 
+ package_data = \
+ {'': ['*']}
diff --git a/dev-python/isort/isort-5.5.3.ebuild b/dev-python/isort/isort-5.5.3.ebuild
new file mode 100644
index 000000000..1b8aa07ca
--- /dev/null
+++ b/dev-python/isort/isort-5.5.3.ebuild
@@ -0,0 +1,35 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="7"
+
+PYTHON_COMPAT=( python3_{6..8} )
+
+inherit distutils-r1
+
+DESCRIPTION="A Python utility / library to sort Python imports."
+HOMEPAGE="https://pycqa.github.io/isort/ https://pypi.org/project/isort/"
+SRC_URI="mirror://pypi/${P:0:1}/${PN}/${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="test"
+
+RDEPEND=""
+BDEPEND="${REDEPEND}
+	dev-python/setuptools[${PYTHON_USEDEP}]
+	>=dev-python/poetry-0.12[${PYTHON_USEDEP}]
+	test? (
+		dev-python/nose[${PYTHON_USEDEP}]
+		dev-python/pytest[${PYTHON_USEDEP}]
+	)"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-${PV}-notest.patch"
+)
+
+python_test() {
+	nosetests --verbose || die
+	py.test -v -v || die
+}