diff --git a/pyhon/commands.py b/pyhon/commands.py
index 7e59c2a..62a0007 100644
--- a/pyhon/commands.py
+++ b/pyhon/commands.py
@@ -85,8 +85,8 @@ class HonCommand:
             self._parameters[name] = HonParameterProgram(name, self, "custom")
 
     async def send(self) -> bool:
-        params = self.parameter_groups["parameters"]
-        ancillary_params = self.parameter_groups["ancillary_parameters"]
+        params = self.parameter_groups.get("parameters", {})
+        ancillary_params = self.parameter_groups.get("ancillaryParameters", {})
         return await self._api.send_command(
             self._appliance, self._name, params, ancillary_params
         )
diff --git a/setup.py b/setup.py
index a59b069..5c30924 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ with open("README.md", "r") as f:
 
 setup(
     name="pyhOn",
-    version="0.10.2",
+    version="0.10.3",
     author="Andre Basche",
     description="Control hOn devices with python",
     long_description=long_description,