diff --git a/src/pocketmine/network/protocol/ResourcePacksInfoPacket.php b/src/pocketmine/network/protocol/ResourcePacksInfoPacket.php
index f36730c32..26aa79beb 100644
--- a/src/pocketmine/network/protocol/ResourcePacksInfoPacket.php
+++ b/src/pocketmine/network/protocol/ResourcePacksInfoPacket.php
@@ -47,13 +47,13 @@ class ResourcePacksInfoPacket extends DataPacket{
 		foreach($this->behaviorPackEntries as $entry){
 			$this->putString($entry->getPackId());
 			$this->putString($entry->getVersion());
-			$this->putLong($entry->getPackSize());
+			$this->putLLong($entry->getPackSize());
 		}
 		$this->putShort(count($this->resourcePackEntries));
 		foreach($this->resourcePackEntries as $entry){
 			$this->putString($entry->getPackId());
 			$this->putString($entry->getVersion());
-			$this->putLong($entry->getPackSize());
+			$this->putLLong($entry->getPackSize());
 		}
 	}
 }
\ No newline at end of file