diff --git a/src/data/mod.rs b/src/data/mod.rs
index 2f67125..fada9ef 100755
--- a/src/data/mod.rs
+++ b/src/data/mod.rs
@@ -1,3 +1,5 @@
+//! `DataReader` and `DataWriter` traits for reading and writing primitive types in the Minecraft protocol
+
 pub mod reader;
 pub mod varint;
 pub mod writer;
diff --git a/src/packet.rs b/src/packet.rs
index 6082596..b3cae83 100755
--- a/src/packet.rs
+++ b/src/packet.rs
@@ -1,3 +1,5 @@
+//! Minecraft packet struct
+
 use crate::data::{DataReader, DataWriter};
 use crate::ProtocolError;
 use std::io::Cursor;
diff --git a/src/zigzag.rs b/src/zigzag.rs
index 2783066..b41018d 100755
--- a/src/zigzag.rs
+++ b/src/zigzag.rs
@@ -1,3 +1,5 @@
+//! VarInt reading helper 
+
 pub trait Zigzag<T> {
     fn zigzag(&self) -> T;
 }