diff --git a/composer.json b/composer.json
index 594e625a9..2ca20c9b9 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,7 @@
       "ext-ds": "^1.2.7",
       "ext-gmp": "*",
       "ext-hash": "*",
+      "ext-igbinary": "^3.0.1",
       "ext-json": "*",
       "ext-leveldb": "^0.2.1",
       "ext-mbstring": "*",
diff --git a/composer.lock b/composer.lock
index fed61c555..60ef9d64a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "eedc6357547d912c1cc4d47477573086",
+    "content-hash": "64291f2e02aeadac88f4f205e8ec76e5",
     "packages": [
         {
             "name": "adhocore/json-comment",
@@ -537,6 +537,7 @@
         "ext-ds": "^1.2.7",
         "ext-gmp": "*",
         "ext-hash": "*",
+        "ext-igbinary": "^3.0.1",
         "ext-json": "*",
         "ext-leveldb": "^0.2.1",
         "ext-mbstring": "*",
diff --git a/src/PocketMine.php b/src/PocketMine.php
index cb403fa84..12325c7ff 100644
--- a/src/PocketMine.php
+++ b/src/PocketMine.php
@@ -78,6 +78,7 @@ namespace pocketmine {
 			"ds" => "Data Structures",
 			"gmp" => "GMP",
 			"hash" => "Hash",
+			"igbinary" => "igbinary",
 			"json" => "JSON",
 			"leveldb" => "LevelDB",
 			"mbstring" => "Multibyte String",