diff --git a/.github/workflows/test-with-pypi.yml b/.github/workflows/test-with-pypi.yml
index 601d2aa5..eecece2b 100644
--- a/.github/workflows/test-with-pypi.yml
+++ b/.github/workflows/test-with-pypi.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: ['ubuntu-latest']
-        python-version: ['3.7', '3.8', '3.10', '3.11']
+        python-version: ['3.8', '3.10', '3.11']
 
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/README.rst b/README.rst
index 4abafe60..e5a8d97d 100644
--- a/README.rst
+++ b/README.rst
@@ -33,7 +33,7 @@ framework. You are free to use:
 Prerequisites
 -------------
 
-The supported versions of Python are Python >= 3.7.  Envisage requires:
+The supported versions of Python are Python >= 3.8.  Envisage requires:
 
 * `apptools <https://pypi.org/project/apptools/>`_
 * `traits <https://pypi.org/project/traits/>`_
diff --git a/etstool.py b/etstool.py
index 244a3190..b4bd76a9 100644
--- a/etstool.py
+++ b/etstool.py
@@ -104,6 +104,7 @@
 
 dependencies = {
     "apptools",
+    "configobj",
     "coverage",
     "enthought_sphinx_theme",
     "pyface",
diff --git a/pyproject.toml b/pyproject.toml
index 516e941e..eafcd3bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = 'envisage'
 version = '7.0.3'
 description = 'Extensible application framework'
 readme = 'README.rst'
-requires-python = '>= 3.7'
+requires-python = '>= 3.8'
 license = {file = 'LICENSE.txt'}
 authors = [{name = 'Enthought', email = 'info@enthought.com'}]
 keywords = ['extensible', 'plugin', 'application', 'framework']
@@ -28,7 +28,7 @@ classifiers = [
     'Topic :: Software Development :: User Interfaces',
 ]
 dependencies = [
-    'apptools',
+    'apptools[preferences]>=5.3',
     'pyface',
     'setuptools',
     'traits>=6.2',