diff --git a/gradle.properties b/gradle.properties
index 6df2753..1f62c17 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 ## Core
 
-VERSION = 0.5.0.6
+VERSION = 0.5.1.0
 
 # 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..c052959 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 = "0.5.1.0";
+	public static final long COMPILE_TIMESTAMP = 1644381263800L;
 }
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..d8979eb 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
@@ -143,7 +143,7 @@ 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 ""; }