diff --git a/avoid_contextlib2.patch b/avoid_contextlib2.patch
deleted file mode 100644
index 6a05ef6..0000000
--- a/avoid_contextlib2.patch
+++ /dev/null
@@ -1,67 +0,0 @@
---- a/sphinxcontrib_trio/__init__.py
-+++ b/sphinxcontrib_trio/__init__.py
-@@ -92,13 +92,6 @@ CM_CODES = set()
- from contextlib import contextmanager
- CM_CODES.add(contextmanager(None).__code__)
- 
--try:
--    from contextlib2 import contextmanager as contextmanager2
--except ImportError:
--    pass
--else:
--    CM_CODES.add(contextmanager2(None).__code__)
--
- extended_function_option_spec = {
-     "async": directives.flag,
-     "decorator": directives.flag,
---- a/test-requirements.txt
-+++ b/test-requirements.txt
-@@ -1,6 +1,5 @@
- pytest
- pytest-cov
- async_generator
--contextlib2
- lxml
- cssselect
---- a/tests/test_sphinxcontrib_trio.py
-+++ b/tests/test_sphinxcontrib_trio.py
-@@ -14,13 +14,6 @@ from pathlib import Path
- import lxml.html
- 
- try:
--    from contextlib2 import contextmanager as contextmanager2
--except ImportError:
--    have_contextmanager2 = False
--else:
--    have_contextmanager2 = True
--
--try:
-     from async_generator import async_generator, yield_
- except ImportError:
-     have_async_generator = False
-@@ -108,12 +101,6 @@ def test_sniff_options():
- 
-     check(cm, "with")
- 
--    if have_contextmanager2:
--        @contextmanager2
--        def cm2():  # pragma: no cover
--            yield
--        check(cm2, "with")
--
-     def manual_cm():  # pragma: no cover
-         pass
-     manual_cm.__returns_contextmanager__ = True
---- a/docs/source/index.rst
-+++ b/docs/source/index.rst
-@@ -111,9 +111,7 @@ Autodetection heuristics
- * ``:with:`` is autodetected for:
- 
-   * functions decorated with `contextlib.contextmanager
--    <https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager>`__
--    or `contextlib2.contextmanager
--    <https://contextlib2.readthedocs.io/en/stable/#contextlib2.contextmanager>`__,
-+    <https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager>`__,
- 
-   * functions that have an attribute ``__returns_contextmanager__``
-     with a truthy value.
diff --git a/python-sphinxcontrib-trio.spec b/python-sphinxcontrib-trio.spec
index 1c4c4b2..596336a 100644
--- a/python-sphinxcontrib-trio.spec
+++ b/python-sphinxcontrib-trio.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-sphinxcontrib-trio
 #
-# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -27,7 +27,6 @@ Group:          Development/Languages/Python
 URL:            https://github.com/python-trio/sphinxcontrib-trio
 Source:         https://files.pythonhosted.org/packages/source/s/sphinxcontrib-trio/sphinxcontrib-trio-%{version}.tar.gz
 # https://github.com/python-trio/sphinxcontrib-trio/issues/18
-Patch0:         avoid_contextlib2.patch
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros