diff --git a/azalea-client/src/connect.rs b/azalea-client/src/connect.rs
index cd6891c0..a73e0146 100755
--- a/azalea-client/src/connect.rs
+++ b/azalea-client/src/connect.rs
@@ -244,10 +244,10 @@ impl Client {
                 println!("Got add entity packet {:?}", p);
             }
             GamePacket::ClientboundSetEntityDataPacket(p) => {
-                println!("Got set entity data packet {:?}", p);
+                // println!("Got set entity data packet {:?}", p);
             }
             GamePacket::ClientboundUpdateAttributesPacket(p) => {
-                println!("Got update attributes packet {:?}", p);
+                // println!("Got update attributes packet {:?}", p);
             }
             GamePacket::ClientboundEntityVelocityPacket(p) => {
                 println!("Got entity velocity packet {:?}", p);
@@ -279,6 +279,9 @@ impl Client {
             GamePacket::ClientboundTeleportEntityPacket(p) => {
                 println!("Got teleport entity packet {:?}", p);
             }
+            GamePacket::ClientboundUpdateAdvancementsPacket(p) => {
+                println!("Got update advancements packet {:?}", p);
+            }
             _ => panic!("Unexpected packet {:?}", packet),
         }
         println!();
diff --git a/azalea-protocol/packet-macros/src/lib.rs b/azalea-protocol/packet-macros/src/lib.rs
index a25492c6..35bf8b9b 100755
--- a/azalea-protocol/packet-macros/src/lib.rs
+++ b/azalea-protocol/packet-macros/src/lib.rs
@@ -72,7 +72,7 @@ fn create_impl_mcbufreadable(ident: &Ident, data: &Data) -> proc_macro2::TokenSt
             impl crate::mc_buf::McBufReadable for #ident {
                 fn read_into(buf: &mut impl std::io::Read) -> Result<Self, String>
                 {
-                    let id = buf.read_varint()?;
+                    let id = crate::mc_buf::McBufVarReadable::var_read_into(buf)?;
                     match id {
                         #match_contents
                         _ => Err(format!("Unknown enum variant {}", id)),
diff --git a/azalea-protocol/src/mc_buf/read.rs b/azalea-protocol/src/mc_buf/read.rs
index e67cfa3c..991bf53b 100755
--- a/azalea-protocol/src/mc_buf/read.rs
+++ b/azalea-protocol/src/mc_buf/read.rs
@@ -6,7 +6,7 @@ use azalea_core::{
 };
 use byteorder::{ReadBytesExt, WriteBytesExt, BE};
 use serde::Deserialize;
-use std::io::Read;
+use std::{collections::HashMap, hash::Hash, io::Read};
 use tokio::io::{AsyncRead, AsyncReadExt};
 use uuid::Uuid;
 
@@ -294,6 +294,17 @@ impl<T: McBufReadable + Send> McBufReadable for Vec<T> {
     }
 }
 
+impl<K: McBufReadable + Send + Eq + Hash, V: McBufReadable + Send> McBufReadable for HashMap<K, V> {
+    default fn read_into(buf: &mut impl Read) -> Result<Self, String> {
+        let length = buf.read_varint()? as usize;
+        let mut contents = HashMap::with_capacity(length);
+        for _ in 0..length {
+            contents.insert(K::read_into(buf)?, V::read_into(buf)?);
+        }
+        Ok(contents)
+    }
+}
+
 impl McBufReadable for Vec<u8> {
     fn read_into(buf: &mut impl Read) -> Result<Self, String> {
         buf.read_byte_array()
diff --git a/azalea-protocol/src/mc_buf/write.rs b/azalea-protocol/src/mc_buf/write.rs
index 10271bf8..66f129f1 100755
--- a/azalea-protocol/src/mc_buf/write.rs
+++ b/azalea-protocol/src/mc_buf/write.rs
@@ -5,7 +5,7 @@ use azalea_core::{
     serializable_uuid::SerializableUuid, BlockPos, Direction, Slot,
 };
 use byteorder::{BigEndian, WriteBytesExt};
-use std::io::Write;
+use std::{collections::HashMap, io::Write};
 use uuid::Uuid;
 
 pub trait Writable: Write {
@@ -174,6 +174,18 @@ impl<T: McBufWritable> McBufWritable for Vec<T> {
     }
 }
 
+impl<K: McBufWritable, V: McBufWritable> McBufWritable for HashMap<K, V> {
+    default fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        u32::var_write_into(&(self.len() as u32), buf)?;
+        for (key, value) in self {
+            key.write_into(buf)?;
+            value.write_into(buf)?;
+        }
+
+        Ok(())
+    }
+}
+
 impl McBufWritable for Vec<u8> {
     fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
         buf.write_byte_array(self)
diff --git a/azalea-protocol/src/packets/game/clientbound_update_advancements_packet.rs b/azalea-protocol/src/packets/game/clientbound_update_advancements_packet.rs
new file mode 100644
index 00000000..fe2c226d
--- /dev/null
+++ b/azalea-protocol/src/packets/game/clientbound_update_advancements_packet.rs
@@ -0,0 +1,90 @@
+use crate::packets::{McBufReadable, McBufWritable};
+use azalea_chat::component::Component;
+use azalea_core::{resource_location::ResourceLocation, Slot};
+use packet_macros::{GamePacket, McBufReadable, McBufWritable};
+use std::{
+    collections::HashMap,
+    io::{Read, Write},
+};
+
+#[derive(Clone, Debug, GamePacket)]
+pub struct ClientboundUpdateAdvancementsPacket {
+    pub reset: bool,
+    pub added: HashMap<ResourceLocation, Advancement>,
+    pub removed: Vec<ResourceLocation>,
+    pub progress: HashMap<ResourceLocation, AdvancementProgress>,
+}
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct Advancement {
+    parent_id: Option<ResourceLocation>,
+    display: Option<DisplayInfo>,
+    // rewards: AdvancementRewards.EMPTY,
+    criteria: HashMap<ResourceLocation, Criterion>,
+    requirements: Vec<Vec<String>>,
+    // requirements_strategy: RequirementsStrategy.AND
+}
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct DisplayInfo {
+    pub title: Component,
+    pub description: Component,
+    pub icon: Slot,
+    pub frame: FrameType,
+    pub flags: DisplayFlags,
+    pub background: Option<ResourceLocation>,
+    pub x: f32,
+    pub y: f32,
+}
+
+#[derive(Clone, Debug)]
+pub struct DisplayFlags {
+    pub background: bool,
+    pub show_toast: bool,
+    pub hidden: bool,
+}
+
+impl McBufReadable for DisplayFlags {
+    fn read_into(buf: &mut impl Read) -> Result<Self, String> {
+        let data = u32::read_into(buf)?;
+        Ok(DisplayFlags {
+            background: (data & 0b1) != 0,
+            show_toast: (data & 0b10) != 0,
+            hidden: (data & 0b100) != 0,
+        })
+    }
+}
+
+impl McBufWritable for DisplayFlags {
+    fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        let mut data = 0;
+        if self.background {
+            data |= 0b1;
+        }
+        if self.show_toast {
+            data |= 0b10;
+        }
+        if self.hidden {
+            data |= 0b100;
+        }
+        u32::write_into(&data, buf)
+    }
+}
+
+#[derive(Clone, Debug, Copy, McBufReadable, McBufWritable)]
+pub enum FrameType {
+    Task = 0,
+    Challenge = 1,
+    Goal = 2,
+}
+
+// nothing is written here
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct Criterion {}
+
+pub type AdvancementProgress = HashMap<ResourceLocation, CriterionProgress>;
+
+#[derive(Clone, Debug, McBufReadable, McBufWritable)]
+pub struct CriterionProgress {
+    date: Option<u64>,
+}
diff --git a/azalea-protocol/src/packets/game/mod.rs b/azalea-protocol/src/packets/game/mod.rs
index d3ea7281..db1c0b11 100755
--- a/azalea-protocol/src/packets/game/mod.rs
+++ b/azalea-protocol/src/packets/game/mod.rs
@@ -25,6 +25,7 @@ pub mod clientbound_set_experience_packet;
 pub mod clientbound_set_health_packet;
 pub mod clientbound_set_time_packet;
 pub mod clientbound_teleport_entity_packet;
+pub mod clientbound_update_advancements_packet;
 pub mod clientbound_update_attributes_packet;
 pub mod clientbound_update_recipes_packet;
 pub mod clientbound_update_tags_packet;
@@ -67,6 +68,7 @@ declare_state_packets!(
         0x52: clientbound_set_health_packet::ClientboundSetHealthPacket,
         0x59: clientbound_set_time_packet::ClientboundSetTimePacket,
         0x62: clientbound_teleport_entity_packet::ClientboundTeleportEntityPacket,
+        0x63: clientbound_update_advancements_packet::ClientboundUpdateAdvancementsPacket,
         0x64: clientbound_update_attributes_packet::ClientboundUpdateAttributesPacket,
         0x66: clientbound_update_recipes_packet::ClientboundUpdateRecipesPacket,
         0x67: clientbound_update_tags_packet::ClientboundUpdateTagsPacket,
diff --git a/code-generator/packetcodegen.py b/code-generator/packetcodegen.py
index 59a48535..bd8f0b3b 100644
--- a/code-generator/packetcodegen.py
+++ b/code-generator/packetcodegen.py
@@ -98,6 +98,7 @@ def generate(burger_packets, mappings: Mappings, target_packet_id, target_packet
             if instruction['operation'] == 'write':
                 obfuscated_field_name = instruction['field']
                 if '.' in obfuscated_field_name or ' ' in obfuscated_field_name or '(' in obfuscated_field_name:
+                    generated_packet_code.append(f'// TODO: {instruction}')
                     continue
                 field_name = mappings.get_field(
                     obfuscated_class_name, obfuscated_field_name)