diff --git a/build.gradle b/build.gradle
index 900baaa..c0eaa9c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,15 +10,15 @@ sourceCompatibility = 17
 targetCompatibility = 17
 
 group 'me.exzork.gcauth'
-version '2.4.0'
+version '2.5.0'
 
 repositories {
     mavenCentral()
 }
 
 dependencies {
-    implementation files('lib/grasscutter-1.1.2-dev.jar')
-    implementation 'org.springframework.security:spring-security-crypto:5.6.3'
+    implementation files('lib/grasscutter-1.2.3-dev.jar')
+    implementation 'org.springframework.security:spring-security-crypto:5.7.1'
     implementation 'commons-logging:commons-logging:1.2'
     implementation 'com.auth0:java-jwt:3.19.2'
     implementation 'javax.servlet:javax.servlet-api:4.0.1'
diff --git a/settings.gradle b/settings.gradle
index 97ba25b..7a19cf4 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,2 +1 @@
 rootProject.name = 'GCAuth'
-
diff --git a/src/main/java/me/exzork/gcauth/GCAuth.java b/src/main/java/me/exzork/gcauth/GCAuth.java
index 6fdf0a1..fa0fd5f 100644
--- a/src/main/java/me/exzork/gcauth/GCAuth.java
+++ b/src/main/java/me/exzork/gcauth/GCAuth.java
@@ -5,9 +5,7 @@ import com.google.gson.GsonBuilder;
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.auth.DefaultAuthentication;
 import emu.grasscutter.plugin.Plugin;
-import static emu.grasscutter.Configuration.ACCOUNT;
 
-import emu.grasscutter.plugin.PluginManager;
 import me.exzork.gcauth.handler.*;
 import me.exzork.gcauth.utils.Authentication;
 
@@ -17,6 +15,8 @@ import java.io.FileWriter;
 import java.io.IOException;
 import java.nio.file.Files;
 
+import static emu.grasscutter.config.Configuration.ACCOUNT;
+
 
 public class GCAuth extends Plugin {
     private static Config config;
diff --git a/src/main/java/me/exzork/gcauth/handler/GCAuthExternalAuthenticator.java b/src/main/java/me/exzork/gcauth/handler/GCAuthExternalAuthenticator.java
index b48f51b..25067cb 100644
--- a/src/main/java/me/exzork/gcauth/handler/GCAuthExternalAuthenticator.java
+++ b/src/main/java/me/exzork/gcauth/handler/GCAuthExternalAuthenticator.java
@@ -1,14 +1,11 @@
 package me.exzork.gcauth.handler;
 
 import com.google.gson.Gson;
-import com.mchange.v1.util.ArrayUtils;
-import emu.grasscutter.Grasscutter;
 import emu.grasscutter.auth.AuthenticationSystem;
 import emu.grasscutter.auth.ExternalAuthenticator;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.game.Account;
 import express.http.Response;
-import io.javalin.http.Context;
 import io.javalin.http.util.RateLimit;
 import me.exzork.gcauth.GCAuth;
 import me.exzork.gcauth.json.AuthResponseJson;
@@ -18,12 +15,11 @@ import me.exzork.gcauth.json.RegisterAccount;
 import me.exzork.gcauth.utils.Authentication;
 
 import java.util.Arrays;
-import java.util.concurrent.TimeUnit;
 
 public class GCAuthExternalAuthenticator implements ExternalAuthenticator {
-    private String[] endPoints = GCAuth.getInstance().getConfig().rateLimit.endPoints;
-    private int maxRequests = GCAuth.getInstance().getConfig().rateLimit.maxRequests;
-    private String timeUnit = GCAuth.getInstance().getConfig().rateLimit.timeUnit;
+    private final String[] endPoints = GCAuth.getInstance().getConfig().rateLimit.endPoints;
+    private final int maxRequests = GCAuth.getInstance().getConfig().rateLimit.maxRequests;
+    private final String timeUnit = GCAuth.getInstance().getConfig().rateLimit.timeUnit;
     @Override
     public void handleLogin(AuthenticationSystem.AuthenticationRequest authenticationRequest) {
         AuthResponseJson authResponse = new AuthResponseJson();
diff --git a/src/main/java/me/exzork/gcauth/handler/GCAuthenticators.java b/src/main/java/me/exzork/gcauth/handler/GCAuthenticators.java
index 9d7b6b6..44f7ed4 100644
--- a/src/main/java/me/exzork/gcauth/handler/GCAuthenticators.java
+++ b/src/main/java/me/exzork/gcauth/handler/GCAuthenticators.java
@@ -1,6 +1,5 @@
 package me.exzork.gcauth.handler;
 
-import emu.grasscutter.Grasscutter;
 import emu.grasscutter.auth.AuthenticationSystem;
 import emu.grasscutter.auth.Authenticator;
 import emu.grasscutter.game.Account;
@@ -11,7 +10,6 @@ import me.exzork.gcauth.utils.Authentication;
 public class GCAuthenticators {
 
     public static class GCAuthAuthenticator implements Authenticator<LoginResultJson> {
-
         @Override
         public LoginResultJson authenticate(AuthenticationSystem.AuthenticationRequest authenticationRequest) {
             var response = new LoginResultJson();
diff --git a/src/main/java/me/exzork/gcauth/utils/Authentication.java b/src/main/java/me/exzork/gcauth/utils/Authentication.java
index f824ed7..e557f13 100644
--- a/src/main/java/me/exzork/gcauth/utils/Authentication.java
+++ b/src/main/java/me/exzork/gcauth/utils/Authentication.java
@@ -17,7 +17,7 @@ import java.util.concurrent.TimeUnit;
 
 public final class Authentication {
     public static final HashMap<String, String> otps = new HashMap<>();
-    private static Algorithm key = Algorithm.HMAC256(generateRandomNumber(32));
+    private static final Algorithm key = Algorithm.HMAC256(generateRandomNumber(32));
     public static Algorithm getKey() {
         return key;
     }
@@ -119,7 +119,6 @@ public final class Authentication {
     public static TimeUnit getTimeUnit(String timeUnit) {
         return switch (timeUnit.toLowerCase()) {
             case "seconds" -> TimeUnit.SECONDS;
-            case "minutes" -> TimeUnit.MINUTES;
             case "hours" -> TimeUnit.HOURS;
             case "days" -> TimeUnit.DAYS;
             default -> TimeUnit.MINUTES;
diff --git a/src/main/resources/plugin.json b/src/main/resources/plugin.json
index 899645a..bc9cf18 100644
--- a/src/main/resources/plugin.json
+++ b/src/main/resources/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "GCAuth",
   "description": "GCAuth is a plugin that allows you to implement authentication for your server.",
-  "version": "2.2.0",
+  "version": "2.5.0",
   "author": ["ExZork"],
   "mainClass": "me.exzork.gcauth.GCAuth"
 }