diff --git a/pom.xml b/pom.xml
index e5b6224..a89ef51 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,25 +26,21 @@
             <id>public-rpg</id>
             <url>https://repo.aurora-pixels.com/repository/public-rpg/</url>
         </repository>
-        <repository>
-            <id>spigotmc-repo</id>
-            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
-        </repository>
     </repositories>
 
     <dependencies>
+        <dependency>
+            <groupId>io.papermc.paper</groupId>
+            <artifactId>paper-api</artifactId>
+            <version>1.20.6-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
         <dependency>
             <groupId>com.sk89q</groupId>
             <artifactId>fastasyncworldedit</artifactId>
             <version>2.11.1</version>
             <classifier>857</classifier>
         </dependency>
-        <dependency>
-            <groupId>org.spigotmc</groupId>
-            <artifactId>spigot-api</artifactId>
-            <version>1.20.6-R0.1-SNAPSHOT</version>
-            <scope>provided</scope>
-        </dependency>
     </dependencies>
 
 
diff --git a/src/main/java/com/yaohun/enderdragonwars/Main.java b/src/main/java/com/yaohun/enderdragonwars/Main.java
index 0aa6f7d..cf7fc21 100644
--- a/src/main/java/com/yaohun/enderdragonwars/Main.java
+++ b/src/main/java/com/yaohun/enderdragonwars/Main.java
@@ -11,7 +11,6 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
-import org.jetbrains.annotations.NotNull;
 
 public class Main extends JavaPlugin {
 
diff --git a/src/main/java/com/yaohun/enderdragonwars/effect/types/BomBomEffect.java b/src/main/java/com/yaohun/enderdragonwars/effect/types/BomBomEffect.java
index 9cb012f..f2215b2 100644
--- a/src/main/java/com/yaohun/enderdragonwars/effect/types/BomBomEffect.java
+++ b/src/main/java/com/yaohun/enderdragonwars/effect/types/BomBomEffect.java
@@ -1,7 +1,5 @@
 package com.yaohun.enderdragonwars.effect.types;
 
-import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.world.entity.EntityType;
 import com.yaohun.enderdragonwars.Main;
 import com.yaohun.enderdragonwars.effect.GiftEffect;
 import com.yaohun.enderdragonwars.game.Game;
@@ -9,7 +7,6 @@ import com.yaohun.enderdragonwars.util.EntityUtil;
 import net.kyori.adventure.text.Component;
 import org.bukkit.*;
 import org.bukkit.attribute.Attribute;
-import org.bukkit.block.Block;
 import org.bukkit.boss.BarColor;
 import org.bukkit.boss.BarStyle;
 import org.bukkit.boss.BossBar;