diff --git a/README.md b/README.md
index 5623d12c..f4409258 100644
--- a/README.md
+++ b/README.md
@@ -60,13 +60,13 @@ Possible values: `Premium`, `Cracked`, `Unknown`
 
 ## Requirements
 
-* Java 17+
+* Java 17+ (Recommended)
 * Server software in offlinemode:
   * Spigot (or a fork e.g. Paper) 1.8.8+
     * Protocol plugin:
-      * [ProtocolLib 5.0+](https://www.spigotmc.org/resources/protocollib.1997/) or
+      * [ProtocolLib 5.1+](https://www.spigotmc.org/resources/protocollib.1997/) or
       * [ProtocolSupport](https://www.spigotmc.org/resources/protocolsupport.7201/)
-  * Latest BungeeCord (or a fork e.g. Waterfall)
+  * Latest BungeeCord (or a fork e.g. Waterfall) or Velocity
 * An auth plugin.
 
 ### Supported auth plugins
diff --git a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/BukkitScheduler.java b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/BukkitScheduler.java
index 5674f875..59ec6bb2 100644
--- a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/BukkitScheduler.java
+++ b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/BukkitScheduler.java
@@ -39,7 +39,7 @@ public class BukkitScheduler extends AsyncScheduler {
     public BukkitScheduler(Plugin plugin, Logger logger) {
         super(logger, command -> Bukkit.getScheduler().runTaskAsynchronously(plugin, command));
 
-        syncExecutor = r -> Bukkit.getScheduler().runTask(plugin, r);
+        syncExecutor = task -> Bukkit.getScheduler().runTask(plugin, task);
     }
 
     public Executor getSyncExecutor() {
diff --git a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibListener.java b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibListener.java
index 7c089eb0..904a769f 100644
--- a/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibListener.java
+++ b/bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibListener.java
@@ -177,7 +177,7 @@ public class ProtocolLibListener extends PacketAdapter {
                                 ClientPublicKey clientPublicKey, byte[] expectedToken) {
         try {
             if (new MinecraftVersion(1, 19, 0).atOrAbove()
-                    && !(new MinecraftVersion(1, 19, 3).atOrAbove())) {
+                    && !new MinecraftVersion(1, 19, 3).atOrAbove()) {
                 Either<byte[], ?> either = packet.getSpecificModifier(Either.class).read(0);
                 if (clientPublicKey == null) {
                     Optional<byte[]> left = either.left();
diff --git a/core/src/main/java/com/github/games647/fastlogin/core/antibot/TickingRateLimiter.java b/core/src/main/java/com/github/games647/fastlogin/core/antibot/TickingRateLimiter.java
index d9c815ce..aa807a02 100644
--- a/core/src/main/java/com/github/games647/fastlogin/core/antibot/TickingRateLimiter.java
+++ b/core/src/main/java/com/github/games647/fastlogin/core/antibot/TickingRateLimiter.java
@@ -107,7 +107,7 @@ public class TickingRateLimiter implements RateLimiter {
         }
     }
 
-    private static class TimeRecord implements Comparable<Long> {
+    private static class TimeRecord implements Comparable<TimeRecord> {
 
         private final long firstMinuteRecord;
         private final long expireTime;
@@ -131,9 +131,9 @@ public class TickingRateLimiter implements RateLimiter {
             return firstMinuteRecord + expireTime <= now;
         }
 
-        @Override
-        public int compareTo(Long other) {
+        public int compareTo(long other) {
             if (other < firstMinuteRecord) {
+                // other is earlier
                 return -1;
             }
 
@@ -143,5 +143,10 @@ public class TickingRateLimiter implements RateLimiter {
 
             return 0;
         }
+
+        @Override
+        public int compareTo(TimeRecord other) {
+            return compareTo(other.firstMinuteRecord);
+        }
     }
 }
diff --git a/core/src/main/java/com/github/games647/fastlogin/core/shared/FloodgateManagement.java b/core/src/main/java/com/github/games647/fastlogin/core/shared/FloodgateManagement.java
index 9a59f550..939dcb3c 100644
--- a/core/src/main/java/com/github/games647/fastlogin/core/shared/FloodgateManagement.java
+++ b/core/src/main/java/com/github/games647/fastlogin/core/shared/FloodgateManagement.java
@@ -33,6 +33,7 @@ import org.geysermc.floodgate.api.player.FloodgatePlayer;
 
 import java.io.IOException;
 import java.net.InetSocketAddress;
+import java.util.Locale;
 import java.util.Optional;
 import java.util.UUID;
 
@@ -61,9 +62,9 @@ public abstract class FloodgateManagement<P extends C, C, L extends LoginSession
         this.username = getName(player);
 
         //load values from config.yml
-        autoLoginFloodgate = core.getConfig().get("autoLoginFloodgate").toString().toLowerCase();
-        autoRegisterFloodgate = core.getConfig().get("autoRegisterFloodgate").toString().toLowerCase();
-        allowNameConflict = core.getConfig().get("allowFloodgateNameConflict").toString().toLowerCase();
+        autoLoginFloodgate = core.getConfig().getString("autoLoginFloodgate").toLowerCase(Locale.ROOT);
+        autoRegisterFloodgate = core.getConfig().getString("autoRegisterFloodgate").toLowerCase(Locale.ROOT);
+        allowNameConflict = core.getConfig().getString("allowFloodgateNameConflict").toLowerCase(Locale.ROOT);
     }
 
     @Override
diff --git a/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java b/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java
index efcca60e..7bdcfea1 100644
--- a/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java
+++ b/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java
@@ -61,6 +61,7 @@ public abstract class LoginSession {
     }
 
     /**
+     * Check if user needs registration once login is successful
      * @return This value is always false if we authenticate the player with a cracked authentication
      */
     public synchronized boolean needsRegistration() {