diff --git a/src/ch20-01-single-threaded.md b/src/ch20-01-single-threaded.md
index d5a2e9d..89b9daa 100644
--- a/src/ch20-01-single-threaded.md
+++ b/src/ch20-01-single-threaded.md
@@ -87,7 +87,7 @@ fn main() {
 }
 
 fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 512];
+    let mut buffer = [0; 1024];
 
     stream.read(&mut buffer).unwrap();
 
@@ -178,7 +178,7 @@ HTTP/1.1 200 OK\r\n\r\n
 # use std::io::prelude::*;
 # use std::net::TcpStream;
 fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 512];
+    let mut buffer = [0; 1024];
 
     stream.read(&mut buffer).unwrap();
 
@@ -230,12 +230,16 @@ use std::fs;
 // --snip--
 
 fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 512];
+    let mut buffer = [0; 1024];
     stream.read(&mut buffer).unwrap();
 
     let contents = fs::read_to_string("hello.html").unwrap();
 
-    let response = format!("HTTP/1.1 200 OK\r\n\r\n{}", contents);
+    let response = format!(
+        "HTTP/1.1 200 OK\r\nContent-Length: {}\r\n\r\n{}",
+        contents.len(),
+        contents
+    );
 
     stream.write(response.as_bytes()).unwrap();
     stream.flush().unwrap();
@@ -265,7 +269,7 @@ fn handle_connection(mut stream: TcpStream) {
 // --snip--
 
 fn handle_connection(mut stream: TcpStream) {
-    let mut buffer = [0; 512];
+    let mut buffer = [0; 1024];
     stream.read(&mut buffer).unwrap();
 
     let get = b"GET / HTTP/1.1\r\n";
@@ -273,7 +277,11 @@ fn handle_connection(mut stream: TcpStream) {
     if buffer.starts_with(get) {
         let contents = fs::read_to_string("hello.html").unwrap();
 
-        let response = format!("HTTP/1.1 200 OK\r\n\r\n{}", contents);
+        let response = format!(
+            "HTTP/1.1 200 OK\r\nContent-Length: {}\r\n\r\n{}",
+            contents.len(),
+            contents
+        );
 
         stream.write(response.as_bytes()).unwrap();
         stream.flush().unwrap();