diff --git a/src/common/headers.rs b/src/common/headers.rs
index 3589543..c6861c3 100644
--- a/src/common/headers.rs
+++ b/src/common/headers.rs
@@ -117,7 +117,6 @@ impl Headers {
     /// # Examples
     ///
     /// ```
-    /// extern crate micro_http;
     /// use micro_http::Headers;
     ///
     /// let mut request_header = Headers::default();
@@ -217,7 +216,6 @@ impl Headers {
     /// # Examples
     ///
     /// ```
-    /// extern crate micro_http;
     /// use micro_http::Headers;
     ///
     /// let request_headers = Headers::try_from(b"Content-Length: 55\r\n\r\n");
@@ -275,7 +273,6 @@ impl MediaType {
     /// # Examples
     ///
     /// ```
-    /// extern crate micro_http;
     /// use micro_http::MediaType;
     ///
     /// assert!(MediaType::try_from(b"application/json").is_ok());
@@ -299,7 +296,6 @@ impl MediaType {
     /// # Examples
     ///
     /// ```
-    /// extern crate micro_http;
     /// use micro_http::MediaType;
     ///
     /// let media_type = MediaType::ApplicationJson;
diff --git a/src/common/mod.rs b/src/common/mod.rs
index 95583b8..2dec180 100644
--- a/src/common/mod.rs
+++ b/src/common/mod.rs
@@ -131,7 +131,6 @@ impl Display for ServerError {
 ///
 /// ## Examples
 /// ```
-/// extern crate micro_http;
 /// use micro_http::Body;
 /// let body = Body::new("This is a test body.".to_string());
 /// assert_eq!(body.raw(), b"This is a test body.");
@@ -216,7 +215,6 @@ impl Method {
 ///
 /// # Examples
 /// ```
-/// extern crate micro_http;
 /// use micro_http::Version;
 /// let version = Version::try_from(b"HTTP/1.1");
 /// assert!(version.is_ok());
diff --git a/src/lib.rs b/src/lib.rs
index 82b7fef..628169e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -45,7 +45,6 @@
 //!
 //! ## Example for parsing an HTTP Request from a slice
 //! ```
-//! extern crate micro_http;
 //! use micro_http::{Request, Version};
 //!
 //! let http_request = Request::try_from(b"GET http://localhost/home HTTP/1.0\r\n\r\n").unwrap();
@@ -55,7 +54,6 @@
 //!
 //! ## Example for creating an HTTP Response
 //! ```
-//! extern crate micro_http;
 //! use micro_http::{Body, MediaType, Response, StatusCode, Version};
 //!
 //! let mut response = Response::new(Version::Http10, StatusCode::OK);
@@ -82,7 +80,6 @@
 //! ## Example for using the server
 //!
 //! ```
-//! extern crate micro_http;
 //! use micro_http::{HttpServer, Response, StatusCode};
 //!
 //! let path_to_socket = "/tmp/example.sock";
@@ -109,9 +106,6 @@
 //! }
 //! ```
 
-extern crate libc;
-extern crate utils;
-
 mod common;
 mod connection;
 mod request;
diff --git a/src/request.rs b/src/request.rs
index 1dba506..b470588 100644
--- a/src/request.rs
+++ b/src/request.rs
@@ -178,7 +178,6 @@ impl Request {
     /// # Examples
     ///
     /// ```
-    /// extern crate micro_http;
     /// use micro_http::Request;
     ///
     /// let http_request = Request::try_from(b"GET http://localhost/home HTTP/1.0\r\n\r\n").unwrap();
diff --git a/src/server.rs b/src/server.rs
index 6003c10..720f04e 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -397,8 +397,6 @@ impl HttpServer {
     ///
     /// ## Non-blocking server
     /// ```
-    /// extern crate utils;
-    ///
     /// use std::os::unix::io::AsRawFd;
     ///
     /// use micro_http::{HttpServer, Response, StatusCode};
diff --git a/src/vmm/src/vmm_config/mmds.rs b/src/vmm/src/vmm_config/mmds.rs
index f6eddd0..349673d 100644
--- a/src/vmm/src/vmm_config/mmds.rs
+++ b/src/vmm/src/vmm_config/mmds.rs
@@ -1,6 +1,8 @@
 // Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
+use serde::{export::Formatter, Deserialize};
+use std::fmt::{Display, Result};
 use std::net::Ipv4Addr;
 
 /// Keeps the MMDS configuration.