diff --git a/auto_rx/auto_rx.service b/auto_rx/auto_rx.service
index 6aa09e1..b7ad2f7 100644
--- a/auto_rx/auto_rx.service
+++ b/auto_rx/auto_rx.service
@@ -3,7 +3,7 @@ Description=auto_rx
 After=syslog.target
 
 [Service]
-ExecStart=/usr/bin/python /home/pi/radiosonde_auto_rx/auto_rx/auto_rx.py -t 0
+ExecStart=/usr/bin/python3 /home/pi/radiosonde_auto_rx/auto_rx/auto_rx.py -t 0
 Restart=always
 RestartSec=120
 WorkingDirectory=/home/pi/radiosonde_auto_rx/auto_rx/
diff --git a/auto_rx/auto_rx.sh b/auto_rx/auto_rx.sh
index 7a2d4c7..a8a1b56 100755
--- a/auto_rx/auto_rx.sh
+++ b/auto_rx/auto_rx.sh
@@ -10,11 +10,12 @@
 #
 
 # change into appropriate directory
-cd /home/pi/radiosonde_auto_rx/auto_rx/
+cd $(dirname $0)
 
 # Clean up old files
 rm log_power*.csv
 
 # Start auto_rx process with a 3 hour timeout.
 # auto_rx will exit after this time.
-python auto_rx.py -t 180
+
+python3 auto_rx.py -t 180