diff --git a/api/src/main/java/net/azisaba/azipluginmessaging/api/AziPluginMessaging.java b/api/src/main/java/net/azisaba/azipluginmessaging/api/AziPluginMessaging.java
index 37b2cca..02fc942 100644
--- a/api/src/main/java/net/azisaba/azipluginmessaging/api/AziPluginMessaging.java
+++ b/api/src/main/java/net/azisaba/azipluginmessaging/api/AziPluginMessaging.java
@@ -2,6 +2,7 @@
 
 import net.azisaba.azipluginmessaging.api.entity.Player;
 import net.azisaba.azipluginmessaging.api.entity.PlayerAdapter;
+import net.azisaba.azipluginmessaging.api.protocol.PacketQueue;
 import net.azisaba.azipluginmessaging.api.server.PacketSender;
 import org.jetbrains.annotations.NotNull;
 
@@ -48,6 +49,13 @@ public interface AziPluginMessaging {
      */
     <T> PlayerAdapter<T> getPlayerAdapter(@NotNull Class<T> clazz);
 
+    /**
+     * Returns the packet queue.
+     * @return the packet queue
+     */
+    @NotNull
+    PacketQueue getPacketQueue();
+
     interface Proxy {
     }
 
diff --git a/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/PacketQueue.java b/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/PacketQueue.java
new file mode 100644
index 0000000..114b2a0
--- /dev/null
+++ b/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/PacketQueue.java
@@ -0,0 +1,25 @@
+package net.azisaba.azipluginmessaging.api.protocol;
+
+import net.azisaba.azipluginmessaging.api.protocol.message.Message;
+import net.azisaba.azipluginmessaging.api.server.PacketSender;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class PacketQueue {
+    public static final PacketQueue EMPTY = new Empty();
+
+    public abstract void add(@NotNull Protocol<?, ?> protocol, @NotNull Message message);
+    public abstract void flush(@NotNull PacketSender sender);
+
+    private static class Empty extends PacketQueue {
+        private Empty() {
+        }
+
+        @Override
+        public void add(@NotNull Protocol<?, ?> protocol, @NotNull Message message) {
+        }
+
+        @Override
+        public void flush(@NotNull PacketSender sender) {
+        }
+    }
+}
diff --git a/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/Protocol.java b/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/Protocol.java
index 725f1a5..6ecbbfc 100644
--- a/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/Protocol.java
+++ b/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/Protocol.java
@@ -1,5 +1,6 @@
 package net.azisaba.azipluginmessaging.api.protocol;
 
+import net.azisaba.azipluginmessaging.api.AziPluginMessagingProvider;
 import net.azisaba.azipluginmessaging.api.Logger;
 import net.azisaba.azipluginmessaging.api.protocol.handler.MessageHandler;
 import net.azisaba.azipluginmessaging.api.protocol.handler.ProxyMessageHandler;
@@ -100,13 +101,22 @@ public T getHandler() {
 
     /**
      * Attempt to send a packet.
-     * @param sender the packet sender to send the packet from.
+     * @param sender the packet sender to send the packet from. if null, the packet will always be queued.
      * @param msg the message to send
      * @return true if the message was sent successfully, false otherwise.
      */
-    public boolean sendPacket(@NotNull PacketSender sender, @NotNull M msg) {
-        if (id != 0 && !sender.isEncrypted()) {
-            throw new IllegalStateException("Cannot send packet " + id + " without encryption");
+    public boolean sendPacket(@Nullable PacketSender sender, @NotNull M msg) {
+        if (id != 0 && (sender == null || !sender.isEncrypted())) {
+            if (this.getPacketFlow() == PacketFlow.TO_SERVER) {
+                throw new IllegalStateException("Cannot send packet " + id + " without encryption");
+            }
+            // usually it should get executed soon after the encryption is done
+            AziPluginMessagingProvider.get().getPacketQueue().add(this, msg);
+            Logger.getCurrentLogger().info("Queued packet " + id + " to send after encryption (sender: {})", sender);
+            return true;
+        }
+        if (sender == null) {
+            throw new IllegalArgumentException("Cannot send packet " + id + " without sender");
         }
         try (ByteArrayOutputStream bout = new ByteArrayOutputStream();
              DataOutputStream out = new DataOutputStream(bout)) {
diff --git a/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/handler/ServerboundEncryptionPacket.java b/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/handler/ServerboundEncryptionPacket.java
index f0d0be3..1c0b736 100644
--- a/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/handler/ServerboundEncryptionPacket.java
+++ b/api/src/main/java/net/azisaba/azipluginmessaging/api/protocol/handler/ServerboundEncryptionPacket.java
@@ -1,5 +1,6 @@
 package net.azisaba.azipluginmessaging.api.protocol.handler;
 
+import net.azisaba.azipluginmessaging.api.AziPluginMessagingProvider;
 import net.azisaba.azipluginmessaging.api.Logger;
 import net.azisaba.azipluginmessaging.api.entity.Player;
 import net.azisaba.azipluginmessaging.api.protocol.message.EncryptionMessage;
@@ -38,5 +39,7 @@ public void handle(@NotNull PacketSender sender, @NotNull EncryptionMessage msg)
         if (Constants.DEBUG) {
             Logger.getCurrentLogger().info("Encryption enabled for " + sender);
         }
+
+        AziPluginMessagingProvider.get().getPacketQueue().flush(sender);
     }
 }
diff --git a/build.gradle.kts b/build.gradle.kts
index f9b5cca..ab65d2b 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "net.azisaba.azipluginmessaging"
-version = "2.0.3"
+version = "2.1.0"
 
 repositories {
     mavenCentral()
diff --git a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/AziPluginMessagingSpigot.java b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/AziPluginMessagingSpigot.java
index f0e268b..998ada0 100644
--- a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/AziPluginMessagingSpigot.java
+++ b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/AziPluginMessagingSpigot.java
@@ -3,11 +3,14 @@
 import net.azisaba.azipluginmessaging.api.AziPluginMessaging;
 import net.azisaba.azipluginmessaging.api.Logger;
 import net.azisaba.azipluginmessaging.api.entity.PlayerAdapter;
+import net.azisaba.azipluginmessaging.api.protocol.PacketQueue;
 import net.azisaba.azipluginmessaging.api.server.PacketSender;
 import net.azisaba.azipluginmessaging.spigot.entity.PlayerImpl;
+import net.azisaba.azipluginmessaging.spigot.protocol.SimplePacketQueue;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 import java.util.Optional;
@@ -15,8 +18,9 @@
 import java.util.stream.Collectors;
 
 public class AziPluginMessagingSpigot implements AziPluginMessaging {
+    private final PacketQueue packetQueue = new SimplePacketQueue();
     private final Logger logger;
-    private final Server server;
+    private final ServerImpl server;
 
     public AziPluginMessagingSpigot(@NotNull SpigotPlugin plugin) {
         this.logger = Logger.createFromJavaLogger(plugin.getLogger());
@@ -34,7 +38,7 @@ public AziPluginMessagingSpigot(@NotNull SpigotPlugin plugin) {
     }
 
     @Override
-    public @NotNull Server getServer() {
+    public @NotNull ServerImpl getServer() {
         return server;
     }
 
@@ -52,6 +56,11 @@ public <T> PlayerAdapter<T> getPlayerAdapter(@NotNull Class<T> clazz) {
         return (PlayerAdapter<T>) (PlayerAdapter<Player>) PlayerImpl::of;
     }
 
+    @Override
+    public @NotNull PacketQueue getPacketQueue() {
+        return packetQueue;
+    }
+
     public static class ServerImpl implements Server {
         @Override
         public @NotNull PacketSender getPacketSender() {
@@ -64,5 +73,15 @@ public static class ServerImpl implements Server {
             Optional<PlayerImpl> encryptedPlayer = players.stream().filter(PlayerImpl::isEncrypted).findAny();
             return encryptedPlayer.orElseGet(() -> players.get(0));
         }
+
+        public @Nullable PacketSender getPacketSenderOrNull() {
+            try {
+                PacketSender sender = getPacketSender();
+                if (sender.isEncrypted()) {
+                    return sender;
+                }
+            } catch (RuntimeException ignored) {}
+            return null;
+        }
     }
 }
diff --git a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java
index 14176c2..efb509d 100644
--- a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java
+++ b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/SpigotPlugin.java
@@ -16,6 +16,7 @@
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.security.KeyPair;
 import java.util.Objects;
@@ -50,6 +51,14 @@ public static PacketSender getAnyPacketSender() {
         return AziPluginMessagingProvider.get().getServer().getPacketSender();
     }
 
+    @Nullable
+    public static PacketSender getAnyPacketSenderOrNull() {
+        if (Bukkit.getOnlinePlayers().isEmpty()) {
+            return null;
+        }
+        return ((AziPluginMessagingSpigot.ServerImpl) AziPluginMessagingProvider.get().getServer()).getPacketSenderOrNull();
+    }
+
     @EventHandler
     public void onPlayerJoin(PlayerJoinEvent e) {
         Bukkit.getScheduler().runTaskLaterAsynchronously(this, () -> {
diff --git a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveGamingSaraCommand.java b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveGamingSaraCommand.java
index 6534571..e381f23 100644
--- a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveGamingSaraCommand.java
+++ b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveGamingSaraCommand.java
@@ -18,7 +18,7 @@ public void execute(@NotNull CommandSender sender, @NotNull String[] args) {
             return;
         }
         Player target = PlayerUtil.getOfflinePlayer(args[0]);
-        boolean res = Protocol.P_GIVE_GAMING_SARA.sendPacket(SpigotPlugin.getAnyPacketSender(), new PlayerMessage(target));
+        boolean res = Protocol.P_GIVE_GAMING_SARA.sendPacket(SpigotPlugin.getAnyPacketSenderOrNull(), new PlayerMessage(target));
         if (res) {
             sender.sendMessage(ChatColor.GREEN + "Sent a request to give " + target.getUsername() + " the gaming sara");
         } else {
diff --git a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveSaraCommand.java b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveSaraCommand.java
index 0ccc446..8b42050 100644
--- a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveSaraCommand.java
+++ b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/commands/GiveSaraCommand.java
@@ -19,7 +19,7 @@ public void execute(@NotNull CommandSender sender, @NotNull String[] args) {
         }
         int amount = Integer.parseInt(args[0]);
         Player target = PlayerUtil.getOfflinePlayer(args[1]);
-        boolean res = Protocol.P_GIVE_SARA.sendPacket(SpigotPlugin.getAnyPacketSender(), new ProxyboundGiveSaraMessage(amount, target));
+        boolean res = Protocol.P_GIVE_SARA.sendPacket(SpigotPlugin.getAnyPacketSenderOrNull(), new ProxyboundGiveSaraMessage(amount, target));
         if (res) {
             sender.sendMessage(ChatColor.GREEN + "Sent a request to give " + target.getUsername() + " the " + amount + "yen sara");
         } else {
diff --git a/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/protocol/SimplePacketQueue.java b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/protocol/SimplePacketQueue.java
new file mode 100644
index 0000000..52a4a35
--- /dev/null
+++ b/spigot/src/main/java/net/azisaba/azipluginmessaging/spigot/protocol/SimplePacketQueue.java
@@ -0,0 +1,30 @@
+package net.azisaba.azipluginmessaging.spigot.protocol;
+
+import net.azisaba.azipluginmessaging.api.protocol.PacketQueue;
+import net.azisaba.azipluginmessaging.api.protocol.Protocol;
+import net.azisaba.azipluginmessaging.api.protocol.message.Message;
+import net.azisaba.azipluginmessaging.api.server.PacketSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+public class SimplePacketQueue extends PacketQueue {
+    private final List<Map.Entry<Protocol<?, ?>, Message>> list = new ArrayList<>();
+
+    public void add(@NotNull Protocol<?, ?> protocol, @NotNull Message message) {
+        Objects.requireNonNull(protocol, "protocol must not be null");
+        Objects.requireNonNull(message, "message must not be null");
+        list.add(new AbstractMap.SimpleImmutableEntry<>(protocol, message));
+    }
+
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public void flush(@NotNull PacketSender sender) {
+        for (Map.Entry<Protocol<?, ? extends Message>, ? extends Message> entry : list) {
+            ((Protocol) entry.getKey()).sendPacket(sender, entry.getValue());
+        }
+    }
+}
diff --git a/velocity/src/main/java/net/azisaba/azipluginmessaging/velocity/AziPluginMessagingVelocity.java b/velocity/src/main/java/net/azisaba/azipluginmessaging/velocity/AziPluginMessagingVelocity.java
index 844ed85..4a0c816 100644
--- a/velocity/src/main/java/net/azisaba/azipluginmessaging/velocity/AziPluginMessagingVelocity.java
+++ b/velocity/src/main/java/net/azisaba/azipluginmessaging/velocity/AziPluginMessagingVelocity.java
@@ -2,14 +2,11 @@
 
 import com.velocitypowered.api.proxy.Player;
 import com.velocitypowered.api.proxy.ProxyServer;
-import com.velocitypowered.api.proxy.messages.MinecraftChannelIdentifier;
 import net.azisaba.azipluginmessaging.api.AziPluginMessaging;
 import net.azisaba.azipluginmessaging.api.Logger;
 import net.azisaba.azipluginmessaging.api.entity.PlayerAdapter;
-import net.azisaba.azipluginmessaging.api.protocol.Protocol;
-import net.azisaba.azipluginmessaging.api.server.PacketSender;
+import net.azisaba.azipluginmessaging.api.protocol.PacketQueue;
 import net.azisaba.azipluginmessaging.velocity.entity.PlayerImpl;
-import net.azisaba.azipluginmessaging.velocity.server.ServerConnectionImpl;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Optional;
@@ -53,6 +50,11 @@ public <T> PlayerAdapter<T> getPlayerAdapter(@NotNull Class<T> clazz) {
         return (PlayerAdapter<T>) (PlayerAdapter<Player>) PlayerImpl::new;
     }
 
+    @Override
+    public @NotNull PacketQueue getPacketQueue() {
+        return PacketQueue.EMPTY;
+    }
+
     public static class ProxyImpl implements Proxy {
     }
 }