diff --git a/components/i_feed/devices/traffic_light.py b/components/i_feed/devices/traffic_light.py
index b194f7a..9ec4fb8 100644
--- a/components/i_feed/devices/traffic_light.py
+++ b/components/i_feed/devices/traffic_light.py
@@ -14,7 +14,7 @@ from pika.exceptions import AMQPConnectionError
 
 SWITCHING_TIME = 15
 # Scale speed of switching by factor x
-SCALING = int(os.environ['DSE2021_SCALING'])
+SCALING = int(os.environ.get('DSE2021_SCALING', 1))
 
 
 class TrafficLight:
diff --git a/components/i_feed/devices/vehicle.py b/components/i_feed/devices/vehicle.py
index 3440cec..2485de9 100644
--- a/components/i_feed/devices/vehicle.py
+++ b/components/i_feed/devices/vehicle.py
@@ -20,7 +20,7 @@ STARTING_POINT = geopy.Point(47.89053, 16.20703)
 # Driving direction in degrees: 0=N, 90=E, 180=S, 270=W
 BEARING = 2
 # Scale speed of vehicles by factor x
-SCALING = int(os.environ['DSE2021_SCALING'])
+SCALING = int(os.environ.get('DSE2021_SCALING', 1))
 # in km/h
 STARTING_VELOCITY = 130 * SCALING
 # Interval between status updates in seconds (is not scaled)
diff --git a/components/orchestration/orchestrator.py b/components/orchestration/orchestrator.py
index 2135582..d374e1f 100644
--- a/components/orchestration/orchestrator.py
+++ b/components/orchestration/orchestrator.py
@@ -23,7 +23,7 @@ sys.modules['target_velocity'] = target_velocity
 
 ENTITY_IDENT_URL = 'http://entityident:5002/api/v1/resources/'
 
-SCALING = int(os.environ['DSE2021_SCALING'])
+SCALING = int(os.environ.get('DSE2021_SCALING', 1))
 
 
 class Orchestrator: