diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f5611ebe..42848bb7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       matrix:
         # only use one version for the lint step
-        python-version: [3.9]
+        python-version: ["3.11"]
 
     steps:
 
@@ -35,6 +35,7 @@ jobs:
 
       - id: dependencies
         run: |
+          sudo apt-get install -y libsnappy-dev
           pip install -r requirements.txt
           pip install -r requirements.dev.txt -c constraints.txt
 
@@ -59,7 +60,7 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.11"]
 
     steps:
       - id: checkout-code
diff --git a/README.rst b/README.rst
index ee4449c9..4b43691a 100644
--- a/README.rst
+++ b/README.rst
@@ -84,7 +84,7 @@ PGHoard can backup and restore PostgreSQL versions 9.6 and above, but is
 only tested and actively developed with version 10 and above.
 
 The daemon is implemented in Python and is tested and developed with version
-3.7 and above. The following Python modules are required:
+3.11 and above. The following Python modules are required:
 
 * psycopg2_ to look up transaction log metadata
 * requests_ for the internal client-server architecture
@@ -127,13 +127,13 @@ should work on other platforms that provide the required modules.
 Vagrant
 =======
 
-The Vagrantfile can be used to setup a vagrant development environment.   The vagrant environment has
-python 3.7, 3.8, 3.9 and 3.10 virtual environments and installations of postgresql 10, 11 and 12, 13 and 14.
+The Vagrantfile can be used to setup a vagrant development environment. The vagrant environment has
+python 3.11 virtual environments and installations of postgresql 10, 11 and 12, 13 and 14.
 
 By default vagrant up will start a Virtualbox environment. The Vagrantfile will also work for libvirt, just prefix
 ``VAGRANT_DEFAULT_PROVIDER=libvirt`` to the ``vagrant up`` command.
 
-Any combination of Python (3.7, 3.8, 3.9 and 3.10) and Postgresql (10, 11, 12, 13 and 14)
+Any combination of Python (3.11) and Postgresql (10, 11, 12, 13 and 14)
 
 Bring up vagrant instance and connect via ssh::
 
@@ -141,27 +141,9 @@ Bring up vagrant instance and connect via ssh::
   vagrant ssh
   vagrant@ubuntu2004:~$ cd /vagrant
 
-Test with Python 3.7 and Postgresql 10::
+Test with Python 3.11 and Postgresql 13::
 
-  vagrant@ubuntu2004:~$ source ~/venv3.7/bin/activate
-  vagrant@ubuntu2004:~$ PG_VERSION=10 make unittest
-  vagrant@ubuntu2004:~$ deactivate
-
-Test with Python 3.8 and Postgresql 11::
-
-  vagrant@ubuntu2004:~$ source ~/venv3.8/bin/activate
-  vagrant@ubuntu2004:~$ PG_VERSION=11 make unittest
-  vagrant@ubuntu2004:~$ deactivate
-
-Test with Python 3.9 and Postgresql 12::
-
-  vagrant@ubuntu2004:~$ source ~/venv3.9/bin/activate
-  vagrant@ubuntu2004:~$ PG_VERSION=12 make unittest
-  vagrant@ubuntu2004:~$ deactivate
-
-Test with Python 3.10 and Postgresql 13::
-
-  vagrant@ubuntu2004:~$ source ~/venv3.10/bin/activate
+  vagrant@ubuntu2004:~$ source ~/venv3.11/bin/activate
   vagrant@ubuntu2004:~$ PG_VERSION=13 make unittest
   vagrant@ubuntu2004:~$ deactivate
 
diff --git a/Vagrantfile b/Vagrantfile
index 4823ef14..2c6ac274 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -68,7 +68,7 @@ Vagrant.configure("2") do |config|
     config.vm.provision "shell", inline: $script, privileged: true
 
     $script = <<-SCRIPT
-        versions=(3.7 3.8 3.9 3.10)
+        versions=(3.11)
         for version in "${versions[@]}"; do
             python${version} -m venv venv${version}
             source ~/venv${version}/bin/activate
diff --git a/setup.py b/setup.py
index 5abc5010..aaa1c8eb 100644
--- a/setup.py
+++ b/setup.py
@@ -53,10 +53,6 @@
         "Intended Audience :: Information Technology",
         "Intended Audience :: System Administrators",
         "License :: OSI Approved :: Apache Software License",
-        "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 :: Database :: Database Engines/Servers",
         "Topic :: Software Development :: Libraries",