diff --git a/.gitignore b/.gitignore
index 548586c..76edc00 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@
 /pyrsistent-0.17.3.tar.gz
 /v0.17.3.tar.gz
 /pyrsistent-0.18.0.tar.gz
+/pyrsistent-0.18.1.tar.gz
diff --git a/00-relax-dependencies.patch b/00-relax-dependencies.patch
deleted file mode 100644
index 5fe6ea8..0000000
--- a/00-relax-dependencies.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/setup.py b/setup.py
-index 931800f..49c1521 100644
---- a/setup.py
-+++ b/setup.py
-@@ -70,7 +70,7 @@ setup(
-         'Programming Language :: Python :: Implementation :: PyPy',
-     ],
-     test_suite='tests',
--    tests_require=['pytest<5', 'hypothesis<5'],
-+    tests_require=['pytest', 'hypothesis'],
-     scripts=[],
-     setup_requires=pytest_runner,
-     ext_modules=extensions,
diff --git a/python-pyrsistent.spec b/python-pyrsistent.spec
index 5608d9b..7eff3af 100644
--- a/python-pyrsistent.spec
+++ b/python-pyrsistent.spec
@@ -6,7 +6,7 @@
 
 Name:           python-pyrsistent
 Summary:        Persistent/Functional/Immutable data structures
-Version:        0.18.0
+Version:        0.18.1
 Release:        %autorelease
 
 # The entire source is MIT, except pyrsistent/_toolz.py which is BSD.
@@ -14,15 +14,7 @@ License:        MIT and BSD
 URL:            https://github.com/tobgu/pyrsistent/
 Source0:        %{url}/archive/v%{version}/pyrsistent-%{version}.tar.gz
 
-# Relax dependencies specified in setup.py (allow newer pytest/hypothesis)
-Patch0:         00-relax-dependencies.patch
-# Make pyrsistent._pmap doctests order-insensitive
-# https://github.com/tobgu/pyrsistent/issues/238
-# https://bugzilla.redhat.com/show_bug.cgi?id=2040164
-Patch1:         %{url}/pull/239.patch
-
 BuildRequires:  python3-devel
-
 BuildRequires:  gcc
 
 # For Sphinx documentation
@@ -32,53 +24,6 @@ BuildRequires:  python3-sphinx-latex
 BuildRequires:  latexmk
 %endif
 
-# We need manual BR’s since they are generally not available where
-# %%pyproject_buildrequires can access them, i.e., outside requirements.txt,
-# and even in requirements.txt a number of packages are not actually required
-# for the RPM build.
-
-# ============================================================================
-# From requirements.txt:
-
-# hypothesis
-BuildRequires:  python3dist(hypothesis)
-
-# ----------------------------------------------------------------------------
-# We do not need these, since we are not running the memorytest* environment
-# from tox.ini.
-# ----------------------------------------------------------------------------
-# memory-profiler==0.57.0
-# psutil==5.7.0
-
-# ----------------------------------------------------------------------------
-# We do not need this, since we are not running the benchmarks from
-# performance_suites/.
-# ----------------------------------------------------------------------------
-# pyperform
-
-# pytest
-BuildRequires:  python3dist(pytest)
-# Sphinx
-BuildRequires:  python3dist(sphinx)
-# sphinx-rtd-theme==0.1.5
-BuildRequires:  python3dist(sphinx-rtd-theme)
-
-# ----------------------------------------------------------------------------
-# We do not need this, since we are not using tox to run the tests.
-# ----------------------------------------------------------------------------
-# tox
-
-# ----------------------------------------------------------------------------
-# We do not need this, since it is implied by pyproject-rpm-macros.
-# ----------------------------------------------------------------------------
-# setuptools>=0.16.1
-
-# ----------------------------------------------------------------------------
-# We do not need these for the RPM build either.
-# ----------------------------------------------------------------------------
-# twine>=3.2
-# pip>=20.2.3
-
 # ============================================================================
 # From setup_requires in setup.py, when tests are to be executed:
 BuildRequires:  python3dist(pytest-runner)
@@ -115,9 +60,24 @@ BuildArch:      noarch
 %prep
 %autosetup -n pyrsistent-%{version} -p1
 
+# Loosen exact-version pins in requirements.txt; we must tolerate newer
+# versions and use what is packaged.
+#
+# We do not need:
+#   - memory-profiler or psutil, since we are not running the memorytest*
+#     environment from tox.ini
+#   - pyperform, since we are not running the benchmarks from
+#     performance_suites/
+#   - tox, since we are not using tox to run the tests
+#   - twine, since it is for maintainer PyPI uploads
+sed -r \
+    -e 's/==/>=/' \
+    -e '/\b(memory-profiler|psutil|pyperform|tox|twine)\b/d' \
+    requirements.txt | tee requirements-filtered.txt
+
 
 %generate_buildrequires
-%pyproject_buildrequires -r
+%pyproject_buildrequires -r requirements-filtered.txt
 
 
 %build
@@ -138,9 +98,8 @@ PYTHONPATH="${PWD}" %make_build -C docs latex SPHINXOPTS='-n %{?_smp_mflags}'
 
 
 %check
+# # See tox.ini:
 %pytest
-# PMap order changes in Python 3.11a3, causing a doctest failure
-# See tox.ini:
 %pytest --doctest-modules pyrsistent
 
 
diff --git a/sources b/sources
index 62a1ce5..c4e7809 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (pyrsistent-0.18.0.tar.gz) = 6bbd6fbb5b3466aac6b9a56a55114b9c12b9b539f88102c64e704879cfe68113badcdecba2be96d17db7799d12f57c7f9ef3be755b25464aaf1d7d944eb82851
+SHA512 (pyrsistent-0.18.1.tar.gz) = ae7e8bc6d1dab52cd6a2a8447514b88f966f34c1cbd3e1aa06aec705f9ffd73e74865b10accdc62185dd9b132da4640c116eaf92c341031c9471e7422a408232