diff --git a/pom.xml b/pom.xml
index e482706..a46a2b1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>pw.yumc</groupId>
 	<artifactId>TeleportRandom</artifactId>
-	<version>1.4.3</version>
+	<version>1.5</version>
 	<name>TeleportRandom</name>
 	<build>
 		<finalName>${project.name}</finalName>
@@ -62,11 +62,8 @@
 		<url>http://ci.yumc.pw/job/${project.artifactId}/</url>
 	</ciManagement>
 	<properties>
-		<update.description>&amp;a代码重构版本</update.description>
-		<update.changes>
-			&amp;b1.4.3 - &amp;c修复世界限制无效 添加CD剩余时间...;
-			&amp;b1.4.2 - &amp;c修复CD只提示无限制的BUG...;
-		</update.changes>
+		<update.description></update.description>
+		<update.changes></update.changes>
 		<env.GIT_COMMIT>DEBUG</env.GIT_COMMIT>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 	</properties>
diff --git a/src/main/java/pw/yumc/TeleportRandom/TeleportRandom.java b/src/main/java/pw/yumc/TeleportRandom/TeleportRandom.java
index 0f093f4..d9d42dc 100644
--- a/src/main/java/pw/yumc/TeleportRandom/TeleportRandom.java
+++ b/src/main/java/pw/yumc/TeleportRandom/TeleportRandom.java
@@ -1,12 +1,7 @@
 package pw.yumc.TeleportRandom;
 
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Random;
-
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
-import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.command.Command;
@@ -14,13 +9,19 @@ import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
-
-import cn.citycraft.PluginHelper.config.FileConfig;
+import pw.yumc.YumCore.config.FileConfig;
 import pw.yumc.YumCore.statistic.Statistics;
 import pw.yumc.YumCore.update.SubscribeTask;
 
+import java.security.SecureRandom;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Random;
+
 public class TeleportRandom extends JavaPlugin implements CommandExecutor {
-    public final static Random rr = new Random();
+    public final static Random r1 = new SecureRandom();
+    public final static Random r2 = new SecureRandom();
+
     public static FileConfig config;
 
     private final Map<String, Long> cd = new HashMap<>();
@@ -85,13 +86,11 @@ public class TeleportRandom extends JavaPlugin implements CommandExecutor {
 
     @Override
     public void onLoad() {
-        config = new FileConfig(this);
+        config = new FileConfig();
     }
 
     public void randomTP(final int limit, final World world, final Player p) {
-        if (world == null || p == null) {
-            throw new IllegalArgumentException();
-        }
+        if (world == null || p == null) { throw new IllegalArgumentException(); }
         getServer().getScheduler().runTaskAsynchronously(this, new Runnable() {
             @Override
             public void run() {
@@ -121,7 +120,9 @@ public class TeleportRandom extends JavaPlugin implements CommandExecutor {
                 getServer().getScheduler().runTask(TeleportRandom.this, new Runnable() {
                     @Override
                     public void run() {
-                        checkBlock(point, p);
+                        while (config.getStringList("ProtectBlock").contains(getBlock(point).getType().name())) {
+                            point.random();
+                        }
                         tp(point, p);
                     }
                 });
@@ -142,24 +143,6 @@ public class TeleportRandom extends JavaPlugin implements CommandExecutor {
         p.sendMessage(String.format(getPluginname() + config.getMessage("Message.Tip"), loc.getWorld().getName(), loc.getBlockX(), loc.getBlockY(), loc.getBlockZ()));
     }
 
-    private void checkBlock(final Point point, final Player p) {
-        final Block bk = getBlock(point);
-        final Material rbm = bk.getType();
-        final String blockname = rbm.name();
-        for (final String protectblock : config.getStringList("ProtectBlock")) {
-            if (protectblock.equalsIgnoreCase(blockname)) {
-                bk.setType(Material.GLASS);
-                p.sendMessage(getPrefix() + config.getMessage("Message.Protect"));
-                this.getServer().getScheduler().runTaskLater(this, new Runnable() {
-                    @Override
-                    public void run() {
-                        bk.setType(rbm);
-                    }
-                }, 200);
-            }
-        }
-    }
-
     private Block getBlock(final Point point) {
         return new Location(point.world, point.x, point.world.getHighestBlockYAt(point.x, point.z) - 1, point.z).getBlock();
     }
@@ -189,10 +172,14 @@ public class TeleportRandom extends JavaPlugin implements CommandExecutor {
         public Point(final int limit, final World world) {
             this.limit = limit;
             this.world = world;
-            x = rr.nextInt(limit);
-            z = rr.nextInt(limit);
-            final int xf = rr.nextInt(x);
-            final int yf = rr.nextInt(z);
+            random();
+        }
+
+        public void random() {
+            x = r1.nextInt(limit);
+            z = r1.nextInt(limit);
+            final int xf = r2.nextInt(x);
+            final int yf = r2.nextInt(z);
             if (xf % 2 != 0) {
                 x = -x;
             }