diff --git a/Lib/ipaddress.py b/Lib/ipaddress.py
index 90c69a4..7df9f20 100644
--- a/Lib/ipaddress.py
+++ b/Lib/ipaddress.py
@@ -400,7 +400,7 @@
     return NotImplemented
 
 
-class _IPAddressBase(object):
+class _IPAddressBase:
 
     """The mother class."""
 
@@ -975,7 +975,7 @@
         return t.__class__('%s/%d' % (str(t.network_address), t.prefixlen))
 
 
-class _BaseV4(object):
+class _BaseV4:
 
     """Base IPv4 object.
 
@@ -1511,7 +1511,7 @@
         return '%s/%s' % (str(self.network_address), str(self.hostmask))
 
 
-class _BaseV6(object):
+class _BaseV6:
 
     """Base IPv6 object.