diff --git a/composer.json b/composer.json
index c38a2bebf..8e4e71c71 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
       "ext-yaml": ">=2.0.0",
       "ext-zip": "*",
       "ext-zlib": ">=1.2.11",
-      "pocketmine/raklib": "dev-master#9b50878021ca545684fc1fd2d9333911ab2988e1",
+      "pocketmine/raklib": "dev-master#87d7e7fba9d8b2231d95d8f55e19c060ebbcb35c",
       "pocketmine/pocketmine-spl": "^0.2.0",
       "pocketmine/pocketmine-binaryutils": "dev-master#a7cd5303a3b215d26bf9be76682ce9311f40e887",
       "pocketmine/pocketmine-nbt": "dev-master#33aaaebab10b501d233b6208d6a170b82f40c3b4"
diff --git a/composer.lock b/composer.lock
index f5817d148..0a26bb6af 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "b649f9dd4cf9477cfe9027cdb75858e0",
+    "content-hash": "5cf5b17b7ad474212f61300e4fbbd012",
     "packages": [
         {
             "name": "pocketmine/pocketmine-binaryutils",
@@ -116,12 +116,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/pmmp/RakLib.git",
-                "reference": "9b50878021ca545684fc1fd2d9333911ab2988e1"
+                "reference": "87d7e7fba9d8b2231d95d8f55e19c060ebbcb35c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/pmmp/RakLib/zipball/9b50878021ca545684fc1fd2d9333911ab2988e1",
-                "reference": "9b50878021ca545684fc1fd2d9333911ab2988e1",
+                "url": "https://api.github.com/repos/pmmp/RakLib/zipball/87d7e7fba9d8b2231d95d8f55e19c060ebbcb35c",
+                "reference": "87d7e7fba9d8b2231d95d8f55e19c060ebbcb35c",
                 "shasum": ""
             },
             "require": {
@@ -146,7 +146,7 @@
                 "source": "https://github.com/pmmp/RakLib/tree/master",
                 "issues": "https://github.com/pmmp/RakLib/issues"
             },
-            "time": "2018-02-07T08:10:25+00:00"
+            "time": "2018-02-18T20:15:02+00:00"
         }
     ],
     "packages-dev": [],
diff --git a/src/pocketmine/network/mcpe/RakLibInterface.php b/src/pocketmine/network/mcpe/RakLibInterface.php
index 62bcff759..46553fac8 100644
--- a/src/pocketmine/network/mcpe/RakLibInterface.php
+++ b/src/pocketmine/network/mcpe/RakLibInterface.php
@@ -98,7 +98,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		return $work;
 	}
 
-	public function closeSession($identifier, $reason){
+	public function closeSession(string $identifier, string $reason) : void{
 		if(isset($this->players[$identifier])){
 			$player = $this->players[$identifier];
 			unset($this->identifiers[spl_object_hash($player)]);
@@ -125,7 +125,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		$this->interface->emergencyShutdown();
 	}
 
-	public function openSession($identifier, $address, $port, $clientID){
+	public function openSession(string $identifier, string $address, int $port, int $clientID) : void{
 		$ev = new PlayerCreationEvent($this, Player::class, Player::class, $address, $port);
 		$this->server->getPluginManager()->callEvent($ev);
 		$class = $ev->getPlayerClass();
@@ -137,7 +137,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		$this->server->addPlayer($identifier, $player);
 	}
 
-	public function handleEncapsulated($identifier, EncapsulatedPacket $packet, $flags){
+	public function handleEncapsulated(string $identifier, EncapsulatedPacket $packet, int $flags) : void{
 		if(isset($this->players[$identifier])){
 			//get this now for blocking in case the player was closed before the exception was raised
 			$address = $this->players[$identifier]->getAddress();
@@ -164,7 +164,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		$this->interface->unblockAddress($address);
 	}
 
-	public function handleRaw($address, $port, $payload){
+	public function handleRaw(string $address, int $port, string $payload) : void{
 		$this->server->handlePacket($address, $port, $payload);
 	}
 
@@ -172,7 +172,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		$this->interface->sendRaw($address, $port, $payload);
 	}
 
-	public function notifyACK($identifier, $identifierACK){
+	public function notifyACK(string $identifier, int $identifierACK) : void{
 
 	}
 
@@ -198,8 +198,8 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		$this->interface->sendOption("portChecking", (bool) $name);
 	}
 
-	public function handleOption($name, $value){
-		if($name === "bandwidth"){
+	public function handleOption(string $option, string $value) : void{
+		if($option === "bandwidth"){
 			$v = unserialize($value);
 			$this->network->addStatistics($v["up"], $v["down"]);
 		}
@@ -241,7 +241,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		return null;
 	}
 
-	public function updatePing(string $identifier, int $pingMS){
+	public function updatePing(string $identifier, int $pingMS) : void{
 		if(isset($this->players[$identifier])){
 			$this->players[$identifier]->updatePing($pingMS);
 		}