diff --git a/openflexure_microscope/api/v1/blueprints/base.py b/openflexure_microscope/api/v1/blueprints/base.py
index 924d7631..3ef923ca 100644
--- a/openflexure_microscope/api/v1/blueprints/base.py
+++ b/openflexure_microscope/api/v1/blueprints/base.py
@@ -205,7 +205,8 @@ class ConfigAPI(MicroscopeView):
         """
         payload = JsonPayload(request)
 
-        logging.debug("Updating settings from POST request.")
+        logging.debug("Updating settings from POST request:")
+        logging.debug(payload.json)
 
         self.microscope.apply_config(payload.json)
         self.microscope.save_config()
diff --git a/openflexure_microscope/camera/pi.py b/openflexure_microscope/camera/pi.py
index ee4d53ee..cf2d70c6 100644
--- a/openflexure_microscope/camera/pi.py
+++ b/openflexure_microscope/camera/pi.py
@@ -173,15 +173,15 @@ class PiCameraStreamer(BaseCamera):
         # Apply gains and let them settle
         if 'analog_gain' in settings_dict:
             logging.debug("Applying analog_gain: {}".format(settings_dict['analog_gain']))
-            set_analog_gain(self.camera, settings_dict['analog_gain'])
+            set_analog_gain(self.camera, float(settings_dict['analog_gain']))
         if 'digital_gain' in settings_dict:
             logging.debug("Applying digital_gain: {}".format(settings_dict['digital_gain']))
-            set_digital_gain(self.camera, settings_dict['digital_gain'])
+            set_digital_gain(self.camera, float(settings_dict['digital_gain']))
         
         # Apply shutter speed
         if 'shutter_speed' in settings_dict:
             logging.debug("Applying shutter_speed: {}".format(settings_dict['shutter_speed']))
-            self.camera.shutter_speed = settings_dict['shutter_speed']
+            self.camera.shutter_speed = int(settings_dict['shutter_speed'])
 
         time.sleep(0.2)  # Let gains settle