diff --git a/spaceapi/sensors.py b/spaceapi/sensors.py
--- a/spaceapi/sensors.py
+++ b/spaceapi/sensors.py
@@ -74,9 +74,9 @@ def set_radiation_value(data):
 def set_sensors(key):
 
     if key in ALLOWED_SENSORS_KEYS and key in active_json['sensors']:
-        data = request.data
+        data = request.data.decode('utf-8')
         try:
-            data = json.loads(data.decode('utf-8'))
+            data = json.loads(data)
 
             try:
                 jsonschema.validate(data, ALLOWED_SENSORS_KEYS[key])