diff --git a/modules/device.py b/modules/device.py
index 349db0a..666fc15 100644
--- a/modules/device.py
+++ b/modules/device.py
@@ -545,6 +545,7 @@ class PhysicalDevice():
                                                       'port', 'details',
                                                       'interfaceid'],
                                     selectGroups=["groupid"],
+                                    selectHostGroups=["groupid"],
                                     selectParentTemplates=["templateid"],
                                     selectInventory=list(self._inventory_map().values()))
         if len(host) > 1:
@@ -587,7 +588,11 @@ class PhysicalDevice():
         else:
             self.logger.debug(f"Host {self.name}: template(s) in-sync.")
 
-        for group in host["groups"]:
+        # Check if Zabbix version is 6 or higher. Issue #93
+        group_dictname = "hostgroups"
+        if str(self.zabbix.version).startswith(('6', '5')):
+            group_dictname = "groups"
+        for group in host[group_dictname]:
             if group["groupid"] == self.group_id:
                 self.logger.debug(f"Host {self.name}: hostgroup in-sync.")
                 break
diff --git a/requirements.txt b/requirements.txt
index a48114c..33f4b90 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 pynetbox
-zabbix_utils
+zabbix-utils==2.0.1