diff --git a/src/main/java/com/cleanroommc/modularui/utils/serialization/ByteBufAdapters.java b/src/main/java/com/cleanroommc/modularui/utils/serialization/ByteBufAdapters.java
index 5334f3da5..3e1dced2e 100644
--- a/src/main/java/com/cleanroommc/modularui/utils/serialization/ByteBufAdapters.java
+++ b/src/main/java/com/cleanroommc/modularui/utils/serialization/ByteBufAdapters.java
@@ -32,7 +32,7 @@ public byte[] deserialize(PacketBuffer buffer) throws IOException {
 
         @Override
         public void serialize(PacketBuffer buffer, byte[] u) throws IOException {
-            buffer.writeBytes(u);
+            buffer.writeByteArray(u);
         }
 
         @Override
@@ -81,7 +81,7 @@ public BigInteger deserialize(PacketBuffer buffer) throws IOException {
 
         @Override
         public void serialize(PacketBuffer buffer, BigInteger u) throws IOException {
-            buffer.writeBytes(u.toByteArray());
+            buffer.writeByteArray(u.toByteArray());
         }
 
         @Override