diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 6860df8..4f07170 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -22,21 +22,36 @@ on:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
-  # This workflow contains a single job called "test"
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4.2.2
+
+      - uses: actions/setup-python@v5.3.0
+        with:
+          python-version: '3.10'
+
+      - name: Install vermin
+        run: pip install vermin
+
+      - name: Check minimum Python version (must not exceed 3.10)
+        run: vermin --target=3.10- --backport enum j1939/
+
   test:
     # The type of runner that the job will run on
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ['3.10', '3.11', '3.12', '3.13']
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v4.2.2
+
+      - uses: actions/setup-python@v5.3.0
         with:
-          python-version: '3.10'
-          
-      - uses: actions/checkout@v2
+          python-version: ${{ matrix.python-version }}
 
       - name: install dependencies
         run: pip3 install -e .[test]
diff --git a/README.rst b/README.rst
index f8a0118..6bfcff3 100644
--- a/README.rst
+++ b/README.rst
@@ -80,6 +80,8 @@ Features
 Installation
 ------------
 
+Requires **Python 3.10 or later** and python-can_ >= 4.2.0.
+
 Install can-j1939 with pip::
 
     $ pip install can-j1939
diff --git a/setup.py b/setup.py
index dee15ff..adb30a0 100644
--- a/setup.py
+++ b/setup.py
@@ -18,10 +18,15 @@
     long_description_content_type='text/x-rst',
     license="MIT",
     platforms=["any"],
+    python_requires=">=3.10",
     classifiers=[
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Intended Audience :: Developers",
         "Topic :: Scientific/Engineering"
     ],
diff --git a/test/test_ca.py b/test/test_ca.py
index d590848..3abb803 100644
--- a/test/test_ca.py
+++ b/test/test_ca.py
@@ -68,12 +68,12 @@ def test_addr_claim_fixed_reduced_time(feeder):
     )
     new_ca = feeder.ecu.add_ca(name=name, device_address=128)
     new_ca.start(0.2)
-    
-    # wait until all messages are processed asynchronously 
-    # rounded up to account for scheduling delays
-    time.sleep(0.3)
 
-    # assert that the expected message was sent
+    # wait until the address claim message is processed, with a 2s timeout
+    deadline = time.monotonic() + 2.0
+    while len(feeder.can_messages) > 0 and time.monotonic() < deadline:
+        time.sleep(0.050)
+
     assert len(feeder.can_messages) == 0