diff --git a/clean_content_views.py b/clean_content_views.py
index 5a52ccf..5cc95f1 100644
--- a/clean_content_views.py
+++ b/clean_content_views.py
@@ -88,10 +88,18 @@ def check_version_views(version_id):
     viewlist = helpers.get_json(
         helpers.KATELLO_API + "content_view_versions/" + str(version_id))
 
+    # Set the key based on the Katello version
+    katello_ver = helpers.get_katello_version()
+    if helpers.version_tuple(katello_ver) >= helpers.version_tuple('3.10'):
+        # Satellite 6.5 has Katello 3.10
+        cv_key = 'environments'
+    else:
+        cv_key = 'katello_content_views'
+
     # If the list is not empty we need to return this fact. A CV that belongs
     # to NO versions will be a candidate for cleanup.
     viewlist['composite_content_view_ids']
-    if viewlist['katello_content_views']:
+    if viewlist[cv_key]:
         version_in_use = True
         msg = "Version " + str(viewlist['version']) + " is associated with published CV"
         helpers.log_msg(msg, 'DEBUG')
diff --git a/helpers.py b/helpers.py
index 17c0d87..b999f9c 100644
--- a/helpers.py
+++ b/helpers.py
@@ -238,6 +238,28 @@ def get_org_label(org_name):
 
     return org_label
 
+def version_tuple(version):
+    """
+    Parse a version string into a tuple for comparison
+
+    A version string is dot (.) separated.
+
+    version_tuple by Phaxmohdem is licensed under CC BY-SA 3.0
+    https://stackoverflow.com/a/28568003/813821
+    https://creativecommons.org/licenses/by-sa/3.0/
+    """
+    filled = []
+    for point in version.split("."):
+        filled.append(point.zfill(8))
+        return tuple(filled)
+
+def get_katello_version():
+    """
+    Return the Katello version
+    """
+    status = get_json(SAT_API + 'status/')
+    return status['version']
+
 
 class ProgressBar:
     def __init__(self, duration):