diff --git a/incremental-21.patch b/incremental-21.patch
new file mode 100644
index 0000000..0cfe85c
--- /dev/null
+++ b/incremental-21.patch
@@ -0,0 +1,65 @@
+From ab934c065177422a7121e44c792c56c32962c4e4 Mon Sep 17 00:00:00 2001
+From: Thomas Grainger <tagrain@gmail.com>
+Date: Tue, 2 Mar 2021 11:27:56 +0000
+Subject: [PATCH] update tests for incremental >= 21.3.0
+
+---
+ pyproject.toml                           | 2 +-
+ setup.cfg                                | 2 +-
+ src/twisted/python/test/test_versions.py | 6 +++---
+ 3 files changed, 5 insertions(+), 5 deletions(-)
+
+Index: Twisted-21.2.0/pyproject.toml
+===================================================================
+--- Twisted-21.2.0.orig/pyproject.toml
++++ Twisted-21.2.0/pyproject.toml
+@@ -2,7 +2,7 @@
+ requires = [
+     "setuptools >= 35.0.2",
+     "wheel >= 0.29.0",
+-    "incremental >= 16.10.1",
++    "incremental >= 21.3.0",
+ ]
+ build-backend = "setuptools.build_meta"
+ 
+Index: Twisted-21.2.0/setup.cfg
+===================================================================
+--- Twisted-21.2.0.orig/setup.cfg
++++ Twisted-21.2.0/setup.cfg
+@@ -28,7 +28,7 @@ python_requires = >=3.5.4
+ install_requires = 
+ 	zope.interface >= 4.4.2
+ 	constantly >= 15.1
+-	incremental >= 16.10.1
++	incremental >= 21.3.0
+ 	Automat >= 0.8.0
+ 	hyperlink >= 17.1.1
+ 	attrs >= 19.2.0
+Index: Twisted-21.2.0/src/twisted/python/test/test_versions.py
+===================================================================
+--- Twisted-21.2.0.orig/src/twisted/python/test/test_versions.py
++++ Twisted-21.2.0/src/twisted/python/test/test_versions.py
+@@ -126,7 +126,7 @@ class VersionsTests(TestCase):
+         Calling C{str} on a version with a prerelease includes the prerelease.
+         """
+         self.assertEqual(
+-            str(Version("dummy", 1, 0, 0, prerelease=1)), "[dummy, version 1.0.0rc1]"
++            str(Version("dummy", 1, 0, 0, prerelease=1)), "[dummy, version 1.0.0.rc1]"
+         )
+ 
+     def testShort(self):
+@@ -145,7 +145,7 @@ class VersionsTests(TestCase):
+         """
+         self.assertEqual(
+             getVersionString(Version("whatever", 8, 0, 0, prerelease=1)),
+-            "whatever 8.0.0rc1",
++            "whatever 8.0.0.rc1",
+         )
+ 
+     def test_base(self):
+@@ -158,4 +158,4 @@ class VersionsTests(TestCase):
+         """
+         The base version includes 'preX' for versions with prereleases.
+         """
+-        self.assertEqual(Version("foo", 1, 0, 0, prerelease=8).base(), "1.0.0rc8")
++        self.assertEqual(Version("foo", 1, 0, 0, prerelease=8).base(), "1.0.0.rc8")
diff --git a/python-Twisted.changes b/python-Twisted.changes
index 5f49221..4ddc8d4 100644
--- a/python-Twisted.changes
+++ b/python-Twisted.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon May 17 10:15:13 UTC 2021 - Dirk Müller <dmueller@suse.com>
+
+- add incremental-21.patch: support newer incremental versions 
+
 -------------------------------------------------------------------
 Wed Mar 10 06:11:42 UTC 2021 - Steve Kowalik <steven.kowalik@suse.com>
 
diff --git a/python-Twisted.spec b/python-Twisted.spec
index 14e3b71..320e84f 100644
--- a/python-Twisted.spec
+++ b/python-Twisted.spec
@@ -36,6 +36,8 @@ Patch2:         no-test_successResultOfWithFailureHasTraceback.patch
 Patch3:         1521_delegate_parseqs_stdlib_bpo42967.patch
 # We don't want to package yet another module, and it is easily skippable
 Patch4:         no-cython_test_exception_raiser.patch
+# PATCH-FIX-UPSTREAM incremental-21.patch https://github.com/twisted/twisted/commit/ab934c065177422a7121e44c792c56c32962c4e4.patch
+Patch5:         incremental-21.patch
 BuildRequires:  %{python_module Automat >= 0.8.0}
 BuildRequires:  %{python_module PyHamcrest >= 1.9.0}
 BuildRequires:  %{python_module appdirs >= 1.4.0}
@@ -47,7 +49,7 @@ BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module h2 >= 3.0}
 BuildRequires:  %{python_module hyperlink >= 17.1.1}
 BuildRequires:  %{python_module idna >= 2.4}
-BuildRequires:  %{python_module incremental >= 16.10.1}
+BuildRequires:  %{python_module incremental >= 21.3.0}
 BuildRequires:  %{python_module pyOpenSSL >= 16.0.0}
 BuildRequires:  %{python_module pyasn1}
 BuildRequires:  %{python_module pyserial >= 3.0}
@@ -71,7 +73,7 @@ Requires:       python-cryptography >= 2.6
 Requires:       python-h2 >= 3.0
 Requires:       python-hyperlink >= 17.1.1
 Requires:       python-idna >= 2.4
-Requires:       python-incremental >= 16.10.1
+Requires:       python-incremental >= 21.3.0
 Requires:       python-pyOpenSSL >= 16.0.0
 Requires:       python-pyasn1
 Requires:       python-pyserial >= 3.0