diff --git a/mqtt_srv.py b/mqtt_srv.py
index db01e38..46a7296 100755
--- a/mqtt_srv.py
+++ b/mqtt_srv.py
@@ -695,7 +695,7 @@ def on_message(client, userdata, msg):
                     #myCmd = "sudo XDG_RUNTIME_DIR=/run/user/1000 -u jd amixer sget Master | awk -F'[][]' '/Left:/ { print $2 }'"
                     myCmd = "sudo XDG_RUNTIME_DIR=/run/user/1000 -u jd amixer sget Master"
                     writeLog(myCmd)
-                    output = subprocess.Popen(myCmd, shell=True)
+                    output = subprocess.Popen(myCmd, shell=False)
 
                     
                     writeLog(f"Status of volume {output}")