diff --git a/cgroupspy/interfaces.py b/cgroupspy/interfaces.py
index be3066c..0b6df50 100644
--- a/cgroupspy/interfaces.py
+++ b/cgroupspy/interfaces.py
@@ -24,7 +24,7 @@
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 """
-from collections import Iterable
+from collections.abc import Iterable
 from cgroupspy.contenttypes import BaseContentType
 
 
diff --git a/setup.py b/setup.py
index 4afcd93..ceda235 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@
         'cgroups',
     ],
     classifiers=[
-        "Programming Language :: Python",
+        "Programming Language :: Python :: 3"
         "Development Status :: 4 - Beta",
         "Intended Audience :: System Administrators",
         "Intended Audience :: Developers",
@@ -33,4 +33,5 @@
     description="Python library for managing cgroups",
     long_description=long_description,
     long_description_content_type='text/markdown',
+    python_requires=">=3.7"
 )