diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 132d31f..0041f84 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
     name: Python ${{ matrix.python-version }}
     steps:
@@ -38,6 +38,8 @@ jobs:
       - run: python -V
       - name: Install 📦
         run: pip install -e .[develop]
+      - name: Inspect environment
+        run: conda list
       - name: Lint with flake8 ⚙️
         run: flake8
       - name: Run tests
diff --git a/environment.yml b/environment.yml
index f2dc09b..ff71344 100644
--- a/environment.yml
+++ b/environment.yml
@@ -7,12 +7,12 @@ channels:
 dependencies:
   # installation
   - pip
-  - python>=3.8
+  - python >=3.9
   - requests
   - requests_cache
   - jinja2
   - defusedxml
-  - webob
+  - webob >=1.8.9  # Python 3.13 support
   - myproxyclient >=2.1.1
   # testing
   - flake8
diff --git a/setup.py b/setup.py
index f44c3d5..6e0eb12 100644
--- a/setup.py
+++ b/setup.py
@@ -28,11 +28,11 @@
           'Topic :: Scientific/Engineering',
           "Programming Language :: Python",
           "Programming Language :: Python :: 3",
-          "Programming Language :: Python :: 3.8",
           "Programming Language :: Python :: 3.9",
           "Programming Language :: Python :: 3.10",
           "Programming Language :: Python :: 3.11",
           "Programming Language :: Python :: 3.12",
+          "Programming Language :: Python :: 3.13",
       ],
       # Get strings from http://pypi.python.org/pypi?%3Aaction=list_classifiers
       keywords='',
@@ -42,7 +42,7 @@
       download_url='https://github.com/ESGF/esgf-pyclient',
       license='BSD',
       # This qualifier can be used to selectively exclude Python versions
-      python_requires=">=3.8.0",
+      python_requires=">=3.9.0",
       packages=find_packages(exclude=['ez_setup', 'examples', 'tests']),
       include_package_data=True,
       zip_safe=False,