diff --git a/components/freemodbus/Kconfig b/components/freemodbus/Kconfig
index e88f18a0bb..1127543d5f 100644
--- a/components/freemodbus/Kconfig
+++ b/components/freemodbus/Kconfig
@@ -107,7 +107,7 @@ menu "Modbus configuration"
 
     config FMB_PORT_TASK_PRIO
         int "Modbus port task priority"
-        range 3 10
+        range 3 23
         default 10
         help
                 Modbus port data processing task priority.