diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index baf6afd0..55ea34a0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,16 +16,10 @@ jobs:
   tox_tests:
     name: tox -e ${{ matrix.toxenv }}
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         include:
-          - python-version: '2.7'
-            toxenv: 'py27-test-nopyx'
-
-          - python-version: '2.7'
-            toxenv: 'py27-test'
-
           - python-version: '3.6'
             toxenv: 'py36-test'
 
@@ -41,6 +35,9 @@ jobs:
           - python-version: '3.10'
             toxenv: 'py310-test'
 
+          - python-version: '3.11'
+            toxenv: 'py311-test'
+
           - python-version: 'pypy-3.7'
             toxenv: 'pypy3-test'
 
@@ -68,7 +65,7 @@ jobs:
           pip install -U pip # so that we can use wheels
           # tox creates the sdist: we need cython to be installed in the env which
           # creates the sdist, to generate the .c files
-          pip install tox cython>=0.29.21
+          pip install tox==3.28.0 cython>=0.29.30
 
       - name: Run tox
         run: tox -e ${{ matrix.toxenv }}
diff --git a/.gitignore b/.gitignore
index 82029a54..d8974429 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,13 @@
 # these are the files produced by cython when building inplace
 capnpy/*.c
 capnpy/*.html
+capnpy/*.so
 capnpy/segment/*.c
 capnpy/segment/*.html
-travis/travis.rsa
\ No newline at end of file
+capnpy/segment/*.so
+capnpy.egg-info
+travis/travis.rsa
+
+build
+__pycache__
+.tox
diff --git a/.travis.yml b/.travis.yml
index b874561c..007e10ae 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -95,7 +95,7 @@ install:
   - pip install tox-travis
   # tox creates the sdist: we need cython to be installed in the env which
   # creates the sdist, to generate the .c files
-  - pip install cython>=0.25
+  - pip install cython>=0.29.30
 
 script:
   - if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then bash ./travis/clone-benchmarks-repo.sh; fi
diff --git a/Makefile b/Makefile
index 220f9001..adac80fa 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ annotate:
 schema: annotate
 	python -m capnpy compile capnpy/schema.capnp --no-pyx --no-convert-case --no-version-check --no-reflection
 
-# run only python2 and python3 tests: this should good enough to be checked
+# run only python3 tests: this should good enough to be checked
 # locally before pushing and run the whole tests on travis
 test:
-	tox -e py27-test,py36-test,py37-test,py38-test
+	tox -e py36-test,py37-test,py38-test
diff --git a/setup.py b/setup.py
index c963e31a..f12e02f4 100644
--- a/setup.py
+++ b/setup.py
@@ -65,8 +65,8 @@
 def my_cythonize(extensions):
     try:
         import Cython
-        if Cython.__version__ < '0.29.21':
-            print ('WARNING: required cython>0.29.21, found %s. The .c files will '
+        if Cython.__version__ < '0.29.30':
+            print ('WARNING: required cython>0.29.30, found %s. The .c files will '
                    'NOT be regenerated' % Cython.__version__)
             raise ImportError
         from Cython.Build import cythonize
@@ -163,7 +163,7 @@ def getext(fname):
 
 if USE_CYTHON:
     ext_modules = get_cython_extensions()
-    extra_install_requires = ['cython>=0.25']
+    extra_install_requires = ['cython>=0.29.30']
 else:
     ext_modules = []
     extra_install_requires = []
diff --git a/tox.ini b/tox.ini
index 9aa4a968..5a7eb33c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,18 +1,15 @@
 [tox]
 # nopyx is a special env where Cython is NOT installed, and thus we run
 # pure-python tests
-envlist = py27-test-nopyx,py27-{test,bench},py35-test,py36-test,py37-test,py38-test,py39-test,[y310-test,pypy-{test,bench},pypy3-{test},docs
+envlist = py35-test,py36-test,py37-test,py38-test,py39-test,py310-test,py311-test,pypy-{test,bench},pypy3-{test},docs
 
 [testenv]
 setenv =
   TOX_ENV={envname}
 
 deps =
-    py27:  pytest==4.6.11
-    !py27: pytest==6.2.5
+    pytest==6.2.5
     #git+https://github.com/antocuni/pytest-benchmark.git#egg=pytest-benchmark
-    py27: pkgconfig==1.5.2
-    py27: pycapnp==0.6.4
 
 commands =
     test: py.test {envsitepackagesdir}/capnpy/testing -rs --pyx {posargs}
@@ -20,11 +17,6 @@ commands =
     #bench: py.test {envsitepackagesdir}/capnpy/benchmarks -rs --benchmark-autosave {posargs}
 
 
-[testenv:py27-test-nopyx]
-setenv =
-  USE_CYTHON=0
-
-
 [testenv:docs]
 setenv =
   USE_CYTHON=0
diff --git a/travis/build-wheels.sh b/travis/build-wheels.sh
index e2897e29..6a914f65 100755
--- a/travis/build-wheels.sh
+++ b/travis/build-wheels.sh
@@ -13,7 +13,7 @@ PYTHONS=(
 
 for pydir in "${PYTHONS[@]}"; do
     pybin=/opt/python/$pydir/bin
-    "${pybin}/pip" install 'cython>=0.25'
+    "${pybin}/pip" install 'cython>=0.29.30'
     "${pybin}/pip" wheel /capnpy/ -w wheelhouse/
 
     # workaround for this bug: