diff --git a/.python-flake8-config b/.flake8
similarity index 100%
rename from .python-flake8-config
rename to .flake8
diff --git a/netfoundry/ctl.py b/netfoundry/ctl.py
index 7aaf42d..34fe585 100644
--- a/netfoundry/ctl.py
+++ b/netfoundry/ctl.py
@@ -13,7 +13,6 @@
 import signal
 import jwt
 import tempfile
-from builtins import list as blist
 from json import dumps as json_dumps
 from json import load as json_load
 from json import loads as json_loads
@@ -43,9 +42,12 @@
 from .organization import Organization
 from .utility import DC_PROVIDERS, EMBED_NET_RESOURCES, IDENTITY_ID_PROPERTIES, MUTABLE_NET_RESOURCES, MUTABLE_RESOURCE_ABBREV, RESOURCE_ABBREV, RESOURCES, any_in, get_generic_resource_by_type_and_id, normalize_caseless, plural, propid2type, singular
 
-set_metadata(version=f"v{netfoundry_version}", author="NetFoundry", name="nfctl")  # must precend import milc.cli
-from milc import cli, questions  # this uses metadata set above
-from milc.subcommand import config  # this creates the config subcommand
+# must precend import milc.cli
+set_metadata(version=f"v{netfoundry_version}", author="NetFoundry", name="nfctl")
+# this uses metadata set above
+from milc import cli, questions  # noqa: E402
+# this creates the config subcommand
+from milc.subcommand import config  # noqa: F401,E402
 
 if platform.system() == 'Linux':
     # this allows the app the terminate gracefully when piped to a truncating consumer like `head`
diff --git a/netfoundry/network.py b/netfoundry/network.py
index 9447de5..a0f10ff 100644
--- a/netfoundry/network.py
+++ b/netfoundry/network.py
@@ -4,6 +4,7 @@
 import re
 import time
 
+from packaging.version import parse
 from requests.exceptions import JSONDecodeError
 
 from netfoundry.exceptions import NetworkBoundaryViolation, UnknownResourceType
@@ -56,7 +57,7 @@ def __init__(self, NetworkGroup: object, network_id: str = None, network_name: s
         self.product_version = self.describe['productVersion']
         self.owner_identity_id = self.describe['ownerIdentityId']
         self.size = self.describe['size']
-        self.o365_breakout_category = self.describe['o365BreakoutCategory']
+        self.o365_breakout_category = self.describe.get('o365BreakoutCategory')
         self.created_at = self.describe['createdAt']
         self.updated_at = self.describe['updatedAt']
         self.created_by = self.describe['createdBy']
@@ -1228,6 +1229,9 @@ def get_controller_session(self, id: str):
         Note that this function requires privileged access to the controller and is intended for emergency, read-only operations by customer support engineers.
         :param id: the UUID of the network controller
         """
+
+        if parse(self.product_version) >= parse("8.0.0"):
+            raise RuntimeError(f"get_controller_session() is unavailable in network version {self.product_version} and later.")
         url = self.audience+'core/v2/network-controllers/'+id+'/session'
         try:
             session, status_symbol = get_generic_resource_by_url(setup=self, url=url)
diff --git a/setup.cfg b/setup.cfg
index 14059a7..151defa 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -30,7 +30,7 @@ install_requires =
     pygments >= 2.11
     pyjwt >= 2.3
     pyyaml >= 5.4
-    requests >= 2.27
+    requests >= 2.27, < 2.30
     tabulate >= 0.8
     requests-cache >= 0.9.4
 setup_requires =