diff --git a/composer.json b/composer.json
index a89f915b2..601086b94 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#998af685be51d6ee8a1e206066ccd96c21450bfd",
+      "pocketmine/raklib": "dev-master#c29bebd2df63680e975d5d129aa25476f3ef86ba",
       "pocketmine/pocketmine-spl": "^0.2.0",
       "pocketmine/pocketmine-binaryutils": "dev-master#a7cd5303a3b215d26bf9be76682ce9311f40e887",
       "pocketmine/pocketmine-nbt": "dev-master#f8934c0aed90d1f55452588f7ebef7c4519518a5"
diff --git a/composer.lock b/composer.lock
index 1896d5527..5e79ffd6c 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": "f13679b4c6a569a758646a63936dbd18",
+    "content-hash": "539efc3616f87bdf637798e9ea4b6125",
     "packages": [
         {
             "name": "pocketmine/pocketmine-binaryutils",
@@ -111,12 +111,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/pmmp/RakLib.git",
-                "reference": "998af685be51d6ee8a1e206066ccd96c21450bfd"
+                "reference": "c29bebd2df63680e975d5d129aa25476f3ef86ba"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/pmmp/RakLib/zipball/998af685be51d6ee8a1e206066ccd96c21450bfd",
-                "reference": "998af685be51d6ee8a1e206066ccd96c21450bfd",
+                "url": "https://api.github.com/repos/pmmp/RakLib/zipball/c29bebd2df63680e975d5d129aa25476f3ef86ba",
+                "reference": "c29bebd2df63680e975d5d129aa25476f3ef86ba",
                 "shasum": ""
             },
             "require": {
@@ -141,7 +141,7 @@
                 "source": "https://github.com/pmmp/RakLib/tree/master",
                 "issues": "https://github.com/pmmp/RakLib/issues"
             },
-            "time": "2018-01-16T19:33:21+00:00"
+            "time": "2018-01-18T18:09:59+00:00"
         }
     ],
     "packages-dev": [],
diff --git a/src/pocketmine/network/mcpe/RakLibInterface.php b/src/pocketmine/network/mcpe/RakLibInterface.php
index e456f618c..64c2f4228 100644
--- a/src/pocketmine/network/mcpe/RakLibInterface.php
+++ b/src/pocketmine/network/mcpe/RakLibInterface.php
@@ -65,7 +65,14 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 	public function __construct(Server $server){
 		$this->server = $server;
 
-		$this->rakLib = new RakLibServer($this->server->getLogger(), \pocketmine\COMPOSER_AUTOLOADER_PATH, $this->server->getPort(), $this->server->getIp() === "" ? "0.0.0.0" : $this->server->getIp(), false);
+		$this->rakLib = new RakLibServer(
+			$this->server->getLogger(),
+			\pocketmine\COMPOSER_AUTOLOADER_PATH,
+			$this->server->getPort(),
+			$this->server->getIp() === "" ? "0.0.0.0" : $this->server->getIp(),
+			false,
+			(int) $this->server->getProperty("network.max-mtu-size", 1492)
+		);
 		$this->interface = new ServerHandler($this->rakLib, $this);
 	}
 
diff --git a/src/pocketmine/resources/pocketmine.yml b/src/pocketmine/resources/pocketmine.yml
index 0181c8eda..3446dd7e3 100644
--- a/src/pocketmine/resources/pocketmine.yml
+++ b/src/pocketmine/resources/pocketmine.yml
@@ -91,6 +91,9 @@ network:
  async-compression: false
  #Experimental, only for Windows. Tries to use UPnP to automatically port forward
  upnp-forwarding: false
+ #Maximum size in bytes of packets sent over the network (default 1492 bytes). Packets larger than this will be
+ #fragmented or split into smaller parts. Clients can request MTU sizes up to but not more than this number.
+ max-mtu-size: 1492
 
 debug:
  #To enable assertion execution, set zend.assertions in your php.ini to 1