diff --git a/files/etc/gl-switch.d/sim.sh b/files/etc/gl-switch.d/sim.sh
index cf71e8e..97324d8 100644
--- a/files/etc/gl-switch.d/sim.sh
+++ b/files/etc/gl-switch.d/sim.sh
@@ -10,8 +10,7 @@ logger -p notice -t blue-merle-toggle  "Called... ${action}"
 if [ "$action" = "on" ];then
     mcu_send_message "Blue Merle ${action}"
     echo "on" > /tmp/sim_change_switch
-    flock -n /tmp/blue-merle-switch.lock  timeout 90  /usr/bin/blue-merle-switch  ||  logger -p notice -t blue-merle-toggle  "Lockfile busy" &
-    logger -p notice -t blue-merle-toggle  "Finished Switch"
+    ubus call file exec '{ "command": "flock", "params": ["-n", "/tmp/blue-merle-switch.lock", "timeout", "90", "/usr/bin/blue-merle-switch"] }'
 
 elif [ "$action" = "off" ];then
     mcu_send_message "Blue Merle ${action}"
@@ -20,4 +19,5 @@ elif [ "$action" = "off" ];then
 else
     echo "off" > /tmp/sim_change_switch
 fi
+logger -p notice -t blue-merle-toggle  "Finished Switch"
 sleep 1