diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ba20f49..cc5e56f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,7 +30,7 @@ jobs:
 
       - name: Run test
         run: |
-          python setup.py install
+          python -m pip install -vv .
           python -m unittest -v regex.test_regex
 
   # Build Linux/macOS/Windows wheels.
diff --git a/.hgeol b/.hgeol
deleted file mode 100644
index 0a90b9c..0000000
--- a/.hgeol
+++ /dev/null
@@ -1,40 +0,0 @@
-[patterns]
-
-# Non human-editable files are binary
-
-**.dsp  = BIN
-**.dsw  = BIN
-**.mk   = BIN
-**.sln  = BIN
-**.vcproj  = BIN
-**.vsprops = BIN
-
-**.aif  = BIN
-**.au   = BIN
-**.bmp  = BIN
-**.db   = BIN
-**.exe  = BIN
-**.icns = BIN
-**.gif  = BIN
-**.ico  = BIN
-**.info = BIN
-**.jpg  = BIN
-**.pck  = BIN
-**.png  = BIN
-**.psd  = BIN
-**.tar  = BIN
-**.xar  = BIN
-**.zip  = BIN
-**.pyd  = BIN
-
-Lib/email/test/data/msg_26.txt = BIN
-Lib/test/sndhdrdata/sndhdr.* = BIN
-Lib/test/decimaltestdata/*.decTest = BIN
-
-# All other files (which presumably are human-editable) are "native".
-# This must be the last rule!
-
-** = native
-
-[repository]
-native = LF
diff --git a/MANIFEST.in b/MANIFEST.in
index 23c6699..a916baf 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,3 +4,4 @@ include regex_3/*.py
 include docs/*.*
 include tools/*.py
 include LICENSE.txt
+include pyproject.toml
diff --git a/regex_3/regex.py b/regex_3/regex.py
index c6e5e57..49b01ef 100644
--- a/regex_3/regex.py
+++ b/regex_3/regex.py
@@ -241,7 +241,7 @@
   "VERSION1", "X", "VERBOSE", "W", "WORD", "error", "Regex", "__version__",
   "__doc__", "RegexFlag"]
 
-__version__ = "2.5.125"
+__version__ = "2.5.126"
 
 # --------------------------------------------------------------------
 # Public interface.
diff --git a/setup.py b/setup.py
index 9d52528..478235f 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 setup(
     name='regex',
-    version='2023.3.23',
+    version='2023.5.2',
     description='Alternative regular expression module, to replace re.',
     long_description=long_description,
     long_description_content_type='text/x-rst',
@@ -21,7 +21,12 @@
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',
         'Operating System :: OS Independent',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Scientific/Engineering :: Information Analysis',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Topic :: Text Processing',