diff --git a/setup.py b/setup.py
index e42d400..f0149eb 100644
--- a/setup.py
+++ b/setup.py
@@ -36,6 +36,11 @@ def read(*names):
           "Programming Language :: Python :: 3.4",
           "Programming Language :: Python :: 3.5",
           "Programming Language :: Python :: 3.6",
+          "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",
           "Operating System :: OS Independent",
           "License :: OSI Approved :: MIT License",
           "Intended Audience :: Developers",
diff --git a/src/stopit/__init__.py b/src/stopit/__init__.py
index 6ca0180..c75e5e3 100644
--- a/src/stopit/__init__.py
+++ b/src/stopit/__init__.py
@@ -7,18 +7,21 @@
 Public resources from ``stopit``
 """
 
-import pkg_resources
-
 from .utils import LOG, TimeoutException
 from .threadstop import ThreadingTimeout, async_raise, threading_timeoutable
 from .signalstop import SignalTimeout, signal_timeoutable
 
 # PEP 396 style version marker
 try:
-    __version__ = pkg_resources.get_distribution(__name__).version
+    from importlib.metadata import version  # Python >=3.8
+    __version__ = version(__name__)
 except:
-    LOG.warning("Could not get the package version from pkg_resources")
-    __version__ = 'unknown'
+    try:
+        import pkg_resources  # Deprecated in recent setuptools
+        __version__ = pkg_resources.get_distribution(__name__).version
+    except:
+        LOG.warning("Could not get the package version from importlib or pkg_resources")
+        __version__ = 'unknown'
 
 __all__ = (
     'ThreadingTimeout', 'async_raise', 'threading_timeoutable',