diff --git a/.travis.yml b/.travis.yml
index c6d2e7d..9311000 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,9 +2,7 @@
 
 language: python
 python:
-  - 3.6
-  - 3.5
-  - 3.4
+  - 3.9
 
 # Command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install: pip install -U tox-travis
@@ -25,4 +23,4 @@ deploy:
   on:
     tags: true
     repo: aldnav/geohash
-    python: 3.6
+    python: 3.9
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 4f3c3f3..fa94cc5 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -102,7 +102,7 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
-3. The pull request should work for Python 3.4, 3.5 and 3.6, and for PyPy. Check
+3. The pull request should work for Python 3.9, and for PyPy. Check
    https://travis-ci.org/aldnav/geohash/pull_requests
    and make sure that the tests pass for all supported Python versions.
 
diff --git a/MANIFEST.in b/MANIFEST.in
index 6330039..a6ccf91 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,7 +3,7 @@ include CONTRIBUTING.rst
 include HISTORY.rst
 include LICENSE
 include README.rst
-include geohash/bin/**/*.*
+recursive-include geohash/bin *
 
 recursive-include tests *
 recursive-exclude * __pycache__
diff --git a/geohash/bin/darwin/arm/geohash.so b/geohash/bin/darwin/arm/geohash.so
index 6f84a15..22759d3 100755
Binary files a/geohash/bin/darwin/arm/geohash.so and b/geohash/bin/darwin/arm/geohash.so differ
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 661cbb4..e1a4243 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,12 +1,12 @@
-bumpversion==0.5.3
-wheel==0.38.1
-watchdog==0.9.0
-flake8==3.5.0
-tox==3.5.2
-coverage==4.5.1
-Sphinx==1.8.1
-twine==1.12.1
+bump2version==1.0.1
+bumpversion==0.6.0
+watchdog==3.0.0
+flake8==6.0.0
+tox==4.4.11
+coverage==7.2.3
+Sphinx==6.1.3
+twine==4.0.2
 
-pytest==3.8.2
-pytest-runner==4.2
-cffi>=1.12.3
+pytest==7.3.0
+pytest-runner==6.0.0
+cffi==1.15.1
diff --git a/setup.cfg b/setup.cfg
index faf3033..27c327c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -21,5 +21,5 @@ exclude = docs
 test = pytest
 
 [tool:pytest]
-collect_ignore = ['setup.py']
+addopts = --ignore=setup.py
 
diff --git a/setup.py b/setup.py
index 9c5d265..42f4f59 100644
--- a/setup.py
+++ b/setup.py
@@ -25,10 +25,7 @@
         'Intended Audience :: Developers',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
         'Natural Language :: English',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.9',
     ],
     description="Encode/decode Geohashes http://geohash.org",
     install_requires=requirements,
diff --git a/tox.ini b/tox.ini
index 80866ba..4727f08 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,9 @@
 [tox]
-envlist = py34, py35, py36, flake8
+envlist = py39, flake8
 
 [travis]
 python =
-    3.6: py36
-    3.5: py35
-    3.4: py34
+    3.9: py39
 
 [testenv:flake8]
 basepython = python