diff --git a/lib/src/main/java/io/github/lonamiwebs/overgram/tl/GzipPacked.java b/lib/src/main/java/io/github/lonamiwebs/overgram/tl/GzipPacked.java
index b8fba3c..b94b68a 100644
--- a/lib/src/main/java/io/github/lonamiwebs/overgram/tl/GzipPacked.java
+++ b/lib/src/main/java/io/github/lonamiwebs/overgram/tl/GzipPacked.java
@@ -30,7 +30,7 @@ public class GzipPacked extends TLObject {
     @Override
     public void deserialize(final BinaryReader reader) throws ClassNotFoundException {
         try {
-            final GZIPInputStream gzip = new GZIPInputStream(new ByteArrayInputStream(reader.read()));
+            final GZIPInputStream gzip = new GZIPInputStream(new ByteArrayInputStream(reader.readBytes()));
             final ByteArrayOutputStream out = new ByteArrayOutputStream(4096);
             final byte[] buffer = new byte[4096];
             int read;