diff --git a/Vagrantfile b/Vagrantfile
index 88f2e64b7..1fc581afd 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -166,7 +166,7 @@ def install_pythons(boxname)
     . ~/.bash_profile
     echo "PYTHON_CONFIGURE_OPTS: ${PYTHON_CONFIGURE_OPTS}"
     pyenv install 3.12.0  # tests
-    pyenv install 3.11.8  # tests, binary build
+    pyenv install 3.11.9  # tests, binary build
     pyenv install 3.10.2  # tests
     pyenv install 3.9.4  # tests
     pyenv rehash
@@ -186,8 +186,8 @@ def build_pyenv_venv(boxname)
     . ~/.bash_profile
     cd /vagrant/borg
     # use the latest 3.11 release
-    pyenv global 3.11.8
-    pyenv virtualenv 3.11.8 borg-env
+    pyenv global 3.11.9
+    pyenv virtualenv 3.11.9 borg-env
     ln -s ~/.pyenv/versions/borg-env .
   EOF
 end
@@ -210,7 +210,7 @@ def install_pyinstaller()
     . ~/.bash_profile
     cd /vagrant/borg
     . borg-env/bin/activate
-    pip install 'pyinstaller==6.5.0'
+    pip install 'pyinstaller==6.7.0'
   EOF
 end
 
@@ -233,8 +233,8 @@ def run_tests(boxname, skip_env)
     . ../borg-env/bin/activate
     if which pyenv 2> /dev/null; then
       # for testing, use the earliest point releases of the supported python versions:
-      pyenv global 3.9.4 3.10.2 3.11.8 3.12.0
-      pyenv local 3.9.4 3.10.2 3.11.8 3.12.0
+      pyenv global 3.9.4 3.10.2 3.11.9 3.12.0
+      pyenv local 3.9.4 3.10.2 3.11.9 3.12.0
     fi
     # otherwise: just use the system python
     # some OSes can only run specific test envs, e.g. because they miss FUSE support:
diff --git a/docs/changes.rst b/docs/changes.rst
index 24dd11033..93b6738d6 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -120,7 +120,7 @@ Compatibility notes:
 Change Log 2.x
 ==============
 
-Version 2.0.0b8 (2024-02-20)
+Version 2.0.0b9 (2024-07-xx)
 ----------------------------
 
 Please note:
@@ -132,6 +132,43 @@ above.
 
 New features:
 
+- add BORG_CACHE_IMPL, default is "adhocwithfiles" to test the new cache
+  implementation, featuring an adhoc non-persistent chunks cache and a
+  persistent files cache. See the docs for other values.
+
+  Requires to run "borg check --repair --archives-only" to delete orphaned
+  chunks before running "borg compact" to free space! These orphans are
+  expected due to the simplified refcounting with the AdHocFilesCache.
+- add BORG_USE_CHUNKS_ARCHIVE env var, #8280
+- automatically rebuild cache on exception, #5213
+
+Bug fixes:
+
+- fix Ctrl-C / SIGINT behaviour for pyinstaller-made binaries, #8155
+- delete: fix error handling with Ctrl-C
+- rcompress: fix error handling with Ctrl-C
+- delete: fix error handling when no archive is specified, #8256
+- setup.py: fix import error reporting for cythonize import, see #8208
+- create: deal with EBUSY, #8123
+- benchmark: inherit options --rsh --remote-path, #8099
+- benchmark: fix return value, #8113
+
+Other changes:
+
+- setup.py: detect noexec build fs issue, see #8208
+- improve acl_get / acl_set error handling (forward port from 1.4-maint)
+- allow msgpack 1.1.0
+- vagrant: use pyinstaller 6.7.0
+- use Python 3.11.9 for binary builds
+- require Cython 3.0.3 at least, #8133
+- docs: add non-root deployment strategy
+
+
+Version 2.0.0b8 (2024-02-20)
+----------------------------
+
+New features:
+
 - create: add the slashdot hack, update docs, #4685
 - BORG_EXIT_CODES=modern: optional more specific return codes (for errors and warnings).