diff --git a/gradle.properties b/gradle.properties
index 6df2753..0aad69a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 ## Core
 
-VERSION = 0.5.0.6
+VERSION = 0.5.1.1
 
 # dependencies
 
diff --git a/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java b/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java
index f48072a..fd967ea 100644
--- a/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java
+++ b/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java
@@ -4,6 +4,6 @@ package cc.sukazyo.cono.morny;
  * the final field that will be updated by gradle automatically.
  */
 public class GradleProjectConfigures {
-	public static final String VERSION = "0.5.0.6";
-	public static final long COMPILE_TIMESTAMP = 1644378359640L;
+	public static final String VERSION = "0.5.1.1";
+	public static final long COMPILE_TIMESTAMP = 1644381533694L;
 }
diff --git a/src/main/java/cc/sukazyo/cono/morny/MornyCoeur.java b/src/main/java/cc/sukazyo/cono/morny/MornyCoeur.java
index 2a7d03c..07ff390 100644
--- a/src/main/java/cc/sukazyo/cono/morny/MornyCoeur.java
+++ b/src/main/java/cc/sukazyo/cono/morny/MornyCoeur.java
@@ -162,8 +162,7 @@ public class MornyCoeur {
 		TrackerDataManager.DAEMON.interrupt();
 		TrackerDataManager.trackingLock.lock();
 		if (isRemoveCommandListWhenExit) {
-			extra().exec(new DeleteMyCommands());
-			logger.info("cleaned up command list.");
+			commandManager.automaticRemoveList();
 		}
 	}
 	
diff --git a/src/main/java/cc/sukazyo/cono/morny/bot/command/MornyCommands.java b/src/main/java/cc/sukazyo/cono/morny/bot/command/MornyCommands.java
index d2fc28b..fa4c7f8 100644
--- a/src/main/java/cc/sukazyo/cono/morny/bot/command/MornyCommands.java
+++ b/src/main/java/cc/sukazyo/cono/morny/bot/command/MornyCommands.java
@@ -8,6 +8,7 @@ import cc.sukazyo.cono.morny.data.TelegramStickers;
 import cc.sukazyo.untitled.telegram.api.formatting.TGToString;
 import cc.sukazyo.untitled.util.telegram.object.InputCommand;
 import com.pengrad.telegrambot.model.BotCommand;
+import com.pengrad.telegrambot.model.DeleteMyCommands;
 import com.pengrad.telegrambot.model.Update;
 import com.pengrad.telegrambot.model.request.ParseMode;
 import com.pengrad.telegrambot.request.SendMessage;
@@ -90,12 +91,18 @@ public class MornyCommands {
 	
 	public void automaticUpdateList () {
 		BotCommand[] commandList = getCommandListTelegram();
+		automaticRemoveList();
 		MornyCoeur.extra().exec(new SetMyCommands(
 				commandList
 		));
 		logger.info("automatic updated telegram command list :\n" + commandListToString(commandList));
 	}
 	
+	public void automaticRemoveList () {
+		MornyCoeur.extra().exec(new DeleteMyCommands());
+		logger.info("cleaned up command list.");
+	}
+	
 	private String commandListToString (@Nonnull BotCommand[] list) {
 		StringBuilder builder = new StringBuilder();
 		for (BotCommand signal : list) {
@@ -143,7 +150,7 @@ public class MornyCommands {
 	///
 	
 	private static class ON implements ITelegramCommand {
-		@Nonnull @Override public String getName () { return "/on"; }
+		@Nonnull @Override public String getName () { return "/o"; }
 		@Nullable
 		@Override public String[] getAliases () { return null; }
 		@Nonnull @Override public String getParamRule () { return ""; }