diff --git a/build.gradle.kts b/build.gradle.kts
index 497d174..9330c13 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,5 @@
 plugins {
     `java-library`
-    alias(libs.plugins.lombok)
 }
 
 val group by properties
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 7460fd9..0ea4b60 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,6 +1,5 @@
 [versions]
 # Plugins
-lombok = "8.11"
 
 # Project tools
 junit-jupiter = "5.11.3"
@@ -15,7 +14,6 @@ paper-api = "1.16.5-R0.1-SNAPSHOT"
 jsonmessage = "1.3.1"
 
 [plugins]
-lombok = { id = "io.freefair.lombok", version.ref = "lombok" }
 
 [libraries]
 com-mysql-mysql-connector-j = { module = "com.mysql:mysql-connector-j", version.ref = "com-mysql-mysql-connector-j" }
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/KDStatusReloaded.java b/src/main/java/jp/azisaba/lgw/kdstatus/KDStatusReloaded.java
index f1b1330..111001e 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/KDStatusReloaded.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/KDStatusReloaded.java
@@ -8,7 +8,6 @@
 import jp.azisaba.lgw.kdstatus.task.DBConnectionCheckTask;
 import jp.azisaba.lgw.kdstatus.task.SavePlayerDataTask;
 import jp.azisaba.lgw.kdstatus.utils.Chat;
-import lombok.Getter;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.java.JavaPlugin;
 
@@ -16,13 +15,9 @@
 
 public class KDStatusReloaded extends JavaPlugin {
 
-    @Getter
     private KDStatusConfig pluginConfig;
-    @Getter
     private KillDeathDataContainer kdDataContainer;
-    @Getter
     private static KDStatusReloaded plugin;
-    @Getter
     private SavePlayerDataTask saveTask;
     private DBConnectionCheckTask dbCheckTask;
 
@@ -110,4 +105,20 @@ public PlayerDataMySQLController getKDData() {
         return kdData;
     }
 
+    public KDStatusConfig getPluginConfig() {
+        return pluginConfig;
+    }
+
+    public KillDeathDataContainer getKdDataContainer() {
+        return kdDataContainer;
+    }
+
+    public static KDStatusReloaded getPlugin() {
+        return plugin;
+    }
+
+    public SavePlayerDataTask getSaveTask() {
+        return saveTask;
+    }
+
 }
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/DBAuthConfig.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/DBAuthConfig.java
index 3da737f..1784975 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/DBAuthConfig.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/DBAuthConfig.java
@@ -1,8 +1,6 @@
 package jp.azisaba.lgw.kdstatus.sql;
 
 import jp.azisaba.lgw.kdstatus.KDStatusReloaded;
-import lombok.AccessLevel;
-import lombok.Getter;
 
 import java.util.logging.Logger;
 
@@ -10,15 +8,31 @@
  * Safe auth config loader
  */
 public class DBAuthConfig {
-    @Getter(AccessLevel.PROTECTED)
     private static String host;
-    @Getter(AccessLevel.PROTECTED)
     private static String port;
-    @Getter(AccessLevel.PROTECTED)
     private static String database;
-    @Getter(AccessLevel.PROTECTED)
     private static String user;
-    @Getter(AccessLevel.PROTECTED)
+
+    protected static String getHost() {
+        return host;
+    }
+
+    protected static String getPort() {
+        return port;
+    }
+
+    protected static String getDatabase() {
+        return database;
+    }
+
+    protected static String getUser() {
+        return user;
+    }
+
+    protected static String getPassword() {
+        return password;
+    }
+
     private static String password;
 
     public static void loadAuthConfig() {
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/HikariMySQLDatabase.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/HikariMySQLDatabase.java
index 0794d16..703aebf 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/HikariMySQLDatabase.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/HikariMySQLDatabase.java
@@ -3,9 +3,7 @@
 
 import com.zaxxer.hikari.HikariConfig;
 import com.zaxxer.hikari.HikariDataSource;
-import lombok.Getter;
-import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
+import org.jetbrains.annotations.NotNull;
 
 import java.sql.Connection;
 import java.sql.PreparedStatement;
@@ -18,16 +16,28 @@
 /**
  * Wrapper class of HikariDataSource for MySQL
  */
-@RequiredArgsConstructor
 public class HikariMySQLDatabase {
     private final Logger logger;
     private final int maxPoolSize;
     private final String host, port, databaseName, user, password;
 
-    @Getter
     private boolean initialized;
     private HikariDataSource hikari;
 
+    public HikariMySQLDatabase(Logger logger, int maxPoolSize, String host, String port, String databaseName, String user, String password) {
+        this.logger = logger;
+        this.maxPoolSize = maxPoolSize;
+        this.host = host;
+        this.port = port;
+        this.databaseName = databaseName;
+        this.user = user;
+        this.password = password;
+    }
+
+    public boolean isInitialized() {
+        return initialized;
+    }
+
     public boolean isConnected() {
         if (hikari == null) return false;
         return hikari.isRunning();
@@ -102,7 +112,7 @@ public Connection getConnectionOrNull() {
     }
 
 
-    public PreparedStatement preparedStatement(@NonNull String sql) {
+    public PreparedStatement preparedStatement(@NotNull String sql) {
         Connection conn = getConnectionOrNull();
         if (conn == null) {
             logger.log(Level.SEVERE, "Failed to create preparedStatement: connection is null");
@@ -124,7 +134,7 @@ public PreparedStatement preparedStatement(@NonNull String sql) {
      * @return result of execution. If failed, return null
      */
 
-    public ResultSet executeQuery(@NonNull String sql, Consumer<PreparedStatement> pstmtConsumer) {
+    public ResultSet executeQuery(@NotNull String sql, Consumer<PreparedStatement> pstmtConsumer) {
         // get a connection
         Connection conn = getConnectionOrNull();
         if (conn == null) {
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/KDUserData.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/KDUserData.java
index 6acb369..df3c095 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/KDUserData.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/KDUserData.java
@@ -2,10 +2,9 @@
 
 import jp.azisaba.lgw.kdstatus.KDStatusReloaded;
 import jp.azisaba.lgw.kdstatus.utils.TimeUnit;
-import lombok.Getter;
-import lombok.NonNull;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.IOException;
@@ -14,7 +13,6 @@
 
 public class KDUserData {
 
-    @Getter
     private final UUID uuid;
 
     private YamlConfiguration conf;
@@ -28,7 +26,6 @@ public class KDUserData {
     public static final String MONTHLY_KILLS_KEY = "MonthlyKill";
     public static final String YEARLY_KILLS_KEY = "YearlyKill";
 
-    @Getter
     private String name;
     private int totalKills, dailyKills, monthlyKills, yearlyKills;
     private int deaths;
@@ -135,13 +132,21 @@ public void addKills(TimeUnit unit, int num) {
         updateLastUpdated();
     }
 
+    public String getName() {
+        return name;
+    }
+
+    public UUID getUuid() {
+        return uuid;
+    }
+
     /**
      * 指定した期間のキル数を取得します
      *
      * @param unit 取得したい期間
      * @return 取得したキル数。なければ0
      */
-    public int getKills(@NonNull TimeUnit unit) {
+    public int getKills(@NotNull TimeUnit unit) {
         fixCorrectValue();
 
         if (unit == TimeUnit.LIFETIME) {
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillDeathDataContainer.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillDeathDataContainer.java
index ee11426..fa2be10 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillDeathDataContainer.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillDeathDataContainer.java
@@ -4,10 +4,10 @@
 import jp.azisaba.lgw.kdstatus.utils.Chat;
 import jp.azisaba.lgw.kdstatus.utils.TimeUnit;
 import jp.azisaba.lgw.kdstatus.utils.UUIDConverter;
-import lombok.NonNull;
 import me.rayzr522.jsonmessage.JSONMessage;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.sql.ResultSet;
@@ -56,7 +56,7 @@ public KDUserData getPlayerData(Player p, boolean loadIfNotLoaded) {
      * @return cacheに保存されている戦績か、ファイルから読み込まれたプレイヤーの戦績
      * @throws NullPointerException 対象プレイヤーがnullの場合
      */
-    public KDUserData loadPlayerData(@NonNull Player p) {
+    public KDUserData loadPlayerData(@NotNull Player p) {
         if (playerDataCache.containsKey(p.getUniqueId())) {
             return playerDataCache.get(p.getUniqueId());
         }
@@ -112,7 +112,7 @@ public boolean removeUserDataFromCache(UUID uuid) {
      * @param p    対象プレイヤー
      * @param save ファイルにセーブするかどうか
      */
-    public boolean unloadPlayer(@NonNull Player p, boolean save) {
+    public boolean unloadPlayer(@NotNull Player p, boolean save) {
         if (!playerDataCache.containsKey(p.getUniqueId())) {
             return true;
         }
@@ -128,7 +128,7 @@ public boolean unloadPlayer(@NonNull Player p, boolean save) {
         return true;
     }
 
-    public boolean savePlayerData(@NonNull KDUserData data) {
+    public boolean savePlayerData(@NotNull KDUserData data) {
         if (!isMigrated) {
             return sqlController.save(data);
         } else {
@@ -136,7 +136,7 @@ public boolean savePlayerData(@NonNull KDUserData data) {
         }
     }
 
-    public boolean savePlayerData(@NonNull Player p) {
+    public boolean savePlayerData(@NotNull Player p) {
         KDUserData userData = getPlayerData(p, false);
         if (userData == null) return true;
         return savePlayerData(userData);
@@ -240,7 +240,7 @@ public List<KillRankingData> getTopKillRankingData(TimeUnit unit, int count) thr
         return null;
     }
 
-    public int getRanking(@NonNull UUID uuid, @NonNull TimeUnit unit) {
+    public int getRanking(@NotNull UUID uuid, @NotNull TimeUnit unit) {
 
         if (!isMigrated) {
             ResultSet set = sqlController.getHandler().executeQuery(
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillRankingData.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillRankingData.java
index 82f7e13..b544b68 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillRankingData.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/KillRankingData.java
@@ -1,10 +1,7 @@
 package jp.azisaba.lgw.kdstatus.sql;
 
-import lombok.Getter;
-
 import java.util.UUID;
 
-@Getter
 public class KillRankingData {
 
     private final UUID uuid;
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/MySQLHandler.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/MySQLHandler.java
index d027300..0518c6a 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/MySQLHandler.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/MySQLHandler.java
@@ -1,20 +1,21 @@
 package jp.azisaba.lgw.kdstatus.sql;
 
-import lombok.Getter;
-
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.SQLException;
 
 public class MySQLHandler {
 
-    @Getter
     private Connection connection;
 
     public boolean isConnected() {
         return (connection != null);
     }
 
+    public Connection getConnection() {
+        return connection;
+    }
+
     /**
      * Internal method for connect MySQL
      *
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataController.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataController.java
index 199ab38..7469ae4 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataController.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataController.java
@@ -1,7 +1,7 @@
 package jp.azisaba.lgw.kdstatus.sql;
 
 import jp.azisaba.lgw.kdstatus.utils.TimeUnit;
-import lombok.NonNull;
+import org.jetbrains.annotations.NotNull;
 
 import java.math.BigInteger;
 import java.sql.ResultSet;
@@ -17,15 +17,15 @@ public interface PlayerDataController {
 
     boolean update(KDUserData data);
 
-    BigInteger getKills(@NonNull UUID uuid, @NonNull TimeUnit unit);
+    BigInteger getKills(@NotNull UUID uuid, @NotNull TimeUnit unit);
 
-    BigInteger getDeaths(@NonNull UUID uuid);
+    BigInteger getDeaths(@NotNull UUID uuid);
 
     String getName(UUID uuid);
 
-    long getLastUpdated(@NonNull UUID uuid);
+    long getLastUpdated(@NotNull UUID uuid);
 
-    ResultSet getRawData(@NonNull UUID uuid);
+    ResultSet getRawData(@NotNull UUID uuid);
 
     int getRank(UUID uuid, TimeUnit unit);
 
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataHikariMySQLController.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataHikariMySQLController.java
index c20f9a5..99a5466 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataHikariMySQLController.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataHikariMySQLController.java
@@ -1,8 +1,7 @@
 package jp.azisaba.lgw.kdstatus.sql;
 
 import jp.azisaba.lgw.kdstatus.utils.TimeUnit;
-import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
+import org.jetbrains.annotations.NotNull;
 
 import java.math.BigInteger;
 import java.sql.PreparedStatement;
@@ -14,11 +13,14 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-@RequiredArgsConstructor
 public class PlayerDataHikariMySQLController implements PlayerDataController {
     private final Logger logger;
     private HikariMySQLDatabase db;
 
+    public PlayerDataHikariMySQLController(Logger logger) {
+        this.logger = logger;
+    }
+
     public void connect() {
     }
 
@@ -91,12 +93,12 @@ public boolean update(KDUserData data) {
     }
 
     @Override
-    public BigInteger getKills(@NonNull UUID uuid, @NonNull TimeUnit unit) {
+    public BigInteger getKills(@NotNull UUID uuid, @NotNull TimeUnit unit) {
         return null;
     }
 
     @Override
-    public BigInteger getDeaths(@NonNull UUID uuid) {
+    public BigInteger getDeaths(@NotNull UUID uuid) {
         return null;
     }
 
@@ -106,12 +108,12 @@ public String getName(UUID uuid) {
     }
 
     @Override
-    public long getLastUpdated(@NonNull UUID uuid) {
+    public long getLastUpdated(@NotNull UUID uuid) {
         return 0;
     }
 
     @Override
-    public ResultSet getRawData(@NonNull UUID uuid) {
+    public ResultSet getRawData(@NotNull UUID uuid) {
         return null;
     }
 
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataMySQLController.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataMySQLController.java
index ce8c08d..277f216 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataMySQLController.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataMySQLController.java
@@ -2,8 +2,7 @@
 
 import jp.azisaba.lgw.kdstatus.KDStatusReloaded;
 import jp.azisaba.lgw.kdstatus.utils.TimeUnit;
-import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
+import org.jetbrains.annotations.NotNull;
 import org.slf4j.LoggerFactory;
 
 import java.math.BigInteger;
@@ -17,12 +16,16 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-@RequiredArgsConstructor
 public class PlayerDataMySQLController {
     private static final org.slf4j.Logger log = LoggerFactory.getLogger(PlayerDataMySQLController.class);
     private final HikariMySQLDatabase sql;
     private final Logger logger;
 
+    public PlayerDataMySQLController(HikariMySQLDatabase sql, Logger logger) {
+        this.sql = sql;
+        this.logger = logger;
+    }
+
     public void init() {
         if (sql.isConnected()) {
             logger.info("SQL Testing...");
@@ -137,7 +140,7 @@ public boolean update(KDUserData data) {
 
     }
 
-    public BigInteger getKills(@NonNull UUID uuid, @NonNull TimeUnit unit) {
+    public BigInteger getKills(@NotNull UUID uuid, @NotNull TimeUnit unit) {
 
         try (Connection conn = sql.getConnection();
              PreparedStatement ps = conn.prepareStatement("SELECT " + unit.getSqlColumnName() + " FROM kill_death_data WHERE uuid=?")) {
@@ -162,7 +165,7 @@ public BigInteger getKills(@NonNull UUID uuid, @NonNull TimeUnit unit) {
 
     }
 
-    public BigInteger getDeaths(@NonNull UUID uuid) {
+    public BigInteger getDeaths(@NotNull UUID uuid) {
 
         try {
 
@@ -187,7 +190,7 @@ public BigInteger getDeaths(@NonNull UUID uuid) {
 
     }
 
-    public String getName(@NonNull UUID uuid) {
+    public String getName(@NotNull UUID uuid) {
 
         try (Connection conn = sql.getConnection();
              PreparedStatement ps = conn.prepareStatement("SELECT name FROM kill_death_data WHERE uuid=?")) {
@@ -212,7 +215,7 @@ public String getName(@NonNull UUID uuid) {
 
     }
 
-    public long getLastUpdated(@NonNull UUID uuid) {
+    public long getLastUpdated(@NotNull UUID uuid) {
 
         try {
 
@@ -237,7 +240,7 @@ public long getLastUpdated(@NonNull UUID uuid) {
 
     }
 
-    public ResultSet getRawData(@NonNull UUID uuid) {
+    public ResultSet getRawData(@NotNull UUID uuid) {
         try (Connection conn = sql.getConnection();
              PreparedStatement ps = conn.prepareStatement("SELECT * FROM kill_death_data WHERE uuid=?")) {
             ps.setString(1, uuid.toString());
@@ -253,7 +256,7 @@ public ResultSet getRawData(@NonNull UUID uuid) {
      * @param name Name of target player
      * @return returns userdata. If failed, returns null.
      */
-    public KDUserData getUserData(@NonNull UUID uuid, @NonNull String name) {
+    public KDUserData getUserData(@NotNull UUID uuid, @NotNull String name) {
         try (Connection conn = sql.getConnection();
              PreparedStatement ps = conn.prepareStatement("SELECT * FROM kill_death_data WHERE uuid=?")) {
             ps.setString(1, uuid.toString());
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataSQLController.java b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataSQLController.java
index 5885ced..0055341 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataSQLController.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/sql/PlayerDataSQLController.java
@@ -2,9 +2,7 @@
 
 import jp.azisaba.lgw.kdstatus.utils.TimeUnit;
 import jp.azisaba.lgw.kdstatus.utils.UUIDConverter;
-import lombok.AccessLevel;
-import lombok.Getter;
-import lombok.NonNull;
+import org.jetbrains.annotations.NotNull;
 
 import java.math.BigInteger;
 import java.sql.ResultSet;
@@ -15,16 +13,22 @@
 
 public class PlayerDataSQLController {
 
-    @Getter(value = AccessLevel.PROTECTED)
     private final SQLHandler handler;
 
-    @Getter(value = AccessLevel.PROTECTED)
     private final String tableName = "killdeathdata";
 
     public PlayerDataSQLController(SQLHandler handler) {
         this.handler = handler;
     }
 
+    protected SQLHandler getHandler() {
+        return handler;
+    }
+
+    protected String getTableName() {
+        return tableName;
+    }
+
     /**
      * テーブルの作成など初期に必要な処理を行います
      *
@@ -52,7 +56,7 @@ public PlayerDataSQLController init() {
         return this;
     }
 
-    public BigInteger getKills(@NonNull UUID uuid, @NonNull TimeUnit unit) {
+    public BigInteger getKills(@NotNull UUID uuid, @NotNull TimeUnit unit) {
         try {
             ResultSet set = handler.executeQuery("select " + unit.getSqlColumnName() + " from \"" + tableName + "\" where uuid='" + UUIDConverter.convert(uuid) + "';");
 
@@ -66,7 +70,7 @@ public BigInteger getKills(@NonNull UUID uuid, @NonNull TimeUnit unit) {
         return BigInteger.valueOf(-1);
     }
 
-    public BigInteger getDeaths(@NonNull UUID uuid) {
+    public BigInteger getDeaths(@NotNull UUID uuid) {
         try {
             ResultSet set = handler.executeQuery("select deaths from \"" + tableName + "\" where uuid='" + UUIDConverter.convert(uuid) + "';");
 
@@ -80,7 +84,7 @@ public BigInteger getDeaths(@NonNull UUID uuid) {
         return BigInteger.valueOf(-1);
     }
 
-    public String getName(@NonNull UUID uuid) {
+    public String getName(@NotNull UUID uuid) {
         try {
             ResultSet set = handler.executeQuery("select name from \"" + tableName + "\" where uuid='" + UUIDConverter.convert(uuid) + "';");
 
@@ -94,7 +98,7 @@ public String getName(@NonNull UUID uuid) {
         return null;
     }
 
-    public long getLastUpdated(@NonNull UUID uuid) {
+    public long getLastUpdated(@NotNull UUID uuid) {
         try {
             ResultSet set = handler.executeQuery("select last_updated from \"" + tableName + "\" where uuid='" + UUIDConverter.convert(uuid) + "';");
 
@@ -108,7 +112,7 @@ public long getLastUpdated(@NonNull UUID uuid) {
         return -1;
     }
 
-    public ResultSet getRawData(@NonNull UUID uuid) {
+    public ResultSet getRawData(@NotNull UUID uuid) {
         return handler.executeQuery("select * from \"" + tableName + "\" where uuid='" + UUIDConverter.convert(uuid) + "';");
     }
 
@@ -139,7 +143,7 @@ public List<KDUserData> getAllData() {
 
     }
 
-    public boolean save(@NonNull KDUserData data) {
+    public boolean save(@NotNull KDUserData data) {
         String uuid = UUIDConverter.convert(data.getUuid());
         String name = data.getName();
         String totalKills = "" + data.getKills(TimeUnit.LIFETIME);
@@ -161,7 +165,7 @@ public boolean save(@NonNull KDUserData data) {
         return changed >= 0;
     }
 
-    public boolean save(@NonNull KDUserData... data2) {
+    public boolean save(@NotNull KDUserData... data2) {
         if (data2.length <= 0) {
             return true;
         }
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/task/DBConnectionCheckTask.java b/src/main/java/jp/azisaba/lgw/kdstatus/task/DBConnectionCheckTask.java
index c78ddc0..e9c81ae 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/task/DBConnectionCheckTask.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/task/DBConnectionCheckTask.java
@@ -1,7 +1,6 @@
 package jp.azisaba.lgw.kdstatus.task;
 
 import jp.azisaba.lgw.kdstatus.KDStatusReloaded;
-import lombok.RequiredArgsConstructor;
 import org.bukkit.scheduler.BukkitRunnable;
 
 import java.sql.Connection;
@@ -9,10 +8,13 @@
 import java.sql.SQLException;
 import java.util.logging.Level;
 
-@RequiredArgsConstructor
 public class DBConnectionCheckTask extends BukkitRunnable {
     private final KDStatusReloaded plugin;
 
+    public DBConnectionCheckTask(KDStatusReloaded plugin) {
+        this.plugin = plugin;
+    }
+
     @Override
     public void run() {
         try (Connection conn = plugin.sql.getConnection()) {
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/task/SavePlayerDataTask.java b/src/main/java/jp/azisaba/lgw/kdstatus/task/SavePlayerDataTask.java
index dd73d52..6e62487 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/task/SavePlayerDataTask.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/task/SavePlayerDataTask.java
@@ -1,7 +1,6 @@
 package jp.azisaba.lgw.kdstatus.task;
 
 import jp.azisaba.lgw.kdstatus.KDStatusReloaded;
-import lombok.Getter;
 import org.bukkit.scheduler.BukkitRunnable;
 
 /**
@@ -12,13 +11,16 @@
 public class SavePlayerDataTask extends BukkitRunnable {
 
     private final KDStatusReloaded plugin;
-    @Getter
     private long lastSavedTime = System.currentTimeMillis();
 
     public SavePlayerDataTask(KDStatusReloaded plugin) {
         this.plugin = plugin;
     }
 
+    public long getLastSavedTime() {
+        return lastSavedTime;
+    }
+
     @Override
     public void run() {
         // 全プレイヤーのデータをセーブする
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/utils/Chat.java b/src/main/java/jp/azisaba/lgw/kdstatus/utils/Chat.java
index 27b1797..93066d1 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/utils/Chat.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/utils/Chat.java
@@ -1,11 +1,9 @@
 package jp.azisaba.lgw.kdstatus.utils;
 
-import lombok.experimental.UtilityClass;
 import org.bukkit.ChatColor;
 
 import java.text.MessageFormat;
 
-@UtilityClass
 public class Chat {
 
     // メッセージをフォーマットして、&で色をつける
diff --git a/src/main/java/jp/azisaba/lgw/kdstatus/utils/UUIDConverter.java b/src/main/java/jp/azisaba/lgw/kdstatus/utils/UUIDConverter.java
index 58ae59a..9aef796 100644
--- a/src/main/java/jp/azisaba/lgw/kdstatus/utils/UUIDConverter.java
+++ b/src/main/java/jp/azisaba/lgw/kdstatus/utils/UUIDConverter.java
@@ -1,12 +1,12 @@
 package jp.azisaba.lgw.kdstatus.utils;
 
-import lombok.NonNull;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.UUID;
 
 public class UUIDConverter {
 
-    public static String convert(@NonNull UUID uuid) {
+    public static String convert(@NotNull UUID uuid) {
         return uuid.toString().replace("-", "");
     }