diff --git a/lib/plugins/statemachine.js b/lib/plugins/statemachine.js
index e8eeabf..e632190 100644
--- a/lib/plugins/statemachine.js
+++ b/lib/plugins/statemachine.js
@@ -298,7 +298,7 @@ function actionSM(action, name = getSM()) {
     if (service.status !== InterpreterStatus.Running)
         return;
     // const machine = service.machine
-    service.send(action.toLowerCase());
+    service.send(action.toUpperCase());
 }
 function stepSM(command = "", ...message_parts) {
     let service = getSM(undefined, true);