diff --git a/src/main/java/cactusServer/entities/Player.java b/src/main/java/cactusServer/entities/Player.java
index 82b391f..4878612 100644
--- a/src/main/java/cactusServer/entities/Player.java
+++ b/src/main/java/cactusServer/entities/Player.java
@@ -21,7 +21,7 @@
 	@JSONHint(ignore = true)
 	public static final int UNIQUE_ID_LENGTH = 12;
 	@JSONHint(ignore = true)
-	public static final long STOP_TIME_LIMIT = (long)(30 * Math.pow(10, 9));
+	public static final long STOP_TIME_LIMIT = (long)(30 * 1e+9);
 
 	private Player() {
 		// JSONDecode���̌Ăяo���p