diff --git a/pyhon/device.py b/pyhon/device.py
index eb4b9e2..e63b89d 100644
--- a/pyhon/device.py
+++ b/pyhon/device.py
@@ -5,7 +5,8 @@ from pyhon.commands import HonCommand
 
 class HonDevice:
     def __init__(self, connector, appliance):
-        appliance["attributes"] = {v["parName"]: v["parValue"] for v in appliance["attributes"]}
+        if attributes := appliance.get("attributes"):
+            appliance["attributes"] = {v["parName"]: v["parValue"] for v in attributes}
         self._appliance = appliance
         self._connector = connector
         self._appliance_model = {}
diff --git a/setup.py b/setup.py
index c3b4ba4..c5ea00a 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ with open("README.md", "r") as f:
 
 setup(
     name="pyhOn",
-    version="0.3.4",
+    version="0.3.5",
     author="Andre Basche",
     description="Control hOn devices with python",
     long_description=long_description,