diff --git a/Cargo.toml b/Cargo.toml
index ed889b8..f69067e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ path = "src/lib.rs"
 
 [dependencies]
 url = "1.7"
-reqwest = "0.8"
+reqwest = {version = "0.8", optional = true}
 rand = "0.4"
 base64 = "0.9"
 threadpool = "1.7"
@@ -29,4 +29,6 @@ bitflags = "1.0.3"
 clippy = {version = "0.0", optional = true}
 
 [features]
-dev = ["clippy"]
\ No newline at end of file
+default = ["online"]
+dev = ["clippy"]
+online = []
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index ccef1c5..744fecd 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,7 +2,10 @@
 #![cfg_attr(feature = "clippy", plugin(clippy))]
 
 #[macro_use] extern crate url;
+
+#[cfg(feature = "online")]
 extern crate reqwest;
+
 extern crate base64;
 extern crate crypto;
 extern crate rand;
@@ -27,7 +30,10 @@ use manager::{ Frame, Flags };
 use config::{Config, Slot};
 use yubicoerror::YubicoError;
 use libusb::{Context};
+
+#[cfg(feature = "online")]
 use reqwest::header::{Headers, UserAgent};
+
 use std::io::prelude::*;
 use base64::{encode, decode};
 use rand::{OsRng, Rng};
@@ -186,6 +192,7 @@ impl Yubico {
     }
     
     // Verify a provided OTP
+    #[cfg(feature = "online")]
     pub fn verify<S>(&self, otp: S, config: Config) -> Result<String>
         where S: Into<String>
     {
@@ -277,10 +284,12 @@ impl Yubico {
     }    
 }
 
+#[cfg(feature = "online")]
 pub struct RequestHandler {
     key: Vec<u8>,   
 }
 
+#[cfg(feature = "online")]
 impl RequestHandler {
     pub fn new(key: Vec<u8>) -> Self {
         RequestHandler {
diff --git a/src/yubicoerror.rs b/src/yubicoerror.rs
index 21a2723..44ba522 100644
--- a/src/yubicoerror.rs
+++ b/src/yubicoerror.rs
@@ -1,3 +1,5 @@
+
+#[cfg(feature = "online")]
 extern crate reqwest;
 
 use std::error;
@@ -9,7 +11,9 @@ use base64::DecodeError as base64Error;
 
 #[derive(Debug)]
 pub enum YubicoError {
+    #[cfg(feature = "online")]
     Network(reqwest::Error),
+    #[cfg(feature = "online")]
     HTTPStatusCode(reqwest::StatusCode),
     IOError(ioError),
     ChannelError(channelError),
@@ -39,7 +43,9 @@ pub enum YubicoError {
 impl fmt::Display for YubicoError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match *self {
+            #[cfg(feature = "online")]
             YubicoError::Network(ref err) => write!(f, "Connectivity error: {}", err),
+            #[cfg(feature = "online")]
             YubicoError::HTTPStatusCode(code) => write!(f, "Error found: {}", code),
             YubicoError::IOError(ref err) => write!(f, "IO error: {}", err),
             YubicoError::ChannelError(ref err) => write!(f, "Channel error: {}", err),
@@ -71,7 +77,9 @@ impl fmt::Display for YubicoError {
 impl error::Error for YubicoError {
     fn description(&self) -> &str {
         match *self {
+            #[cfg(feature = "online")]
             YubicoError::Network(ref err) => err.description(),
+            #[cfg(feature = "online")]
             YubicoError::HTTPStatusCode(_) => "200 not received",
             YubicoError::IOError(ref err) => err.description(),
             YubicoError::ChannelError(ref err) => err.description(),
@@ -101,7 +109,9 @@ impl error::Error for YubicoError {
 
     fn cause(&self) -> Option<&error::Error> {
         match *self {
+            #[cfg(feature = "online")]
             YubicoError::Network(ref err) => Some(err),
+            #[cfg(feature = "online")]
             YubicoError::HTTPStatusCode(_) => None,
             YubicoError::IOError(ref err) => Some(err),
             YubicoError::ChannelError(ref err) => Some(err),
@@ -130,12 +140,14 @@ impl error::Error for YubicoError {
     }
 }
 
+#[cfg(feature = "online")]
 impl From<reqwest::Error> for YubicoError {
     fn from(err: reqwest::Error) -> YubicoError {
         YubicoError::Network(err)
     }
 }
 
+#[cfg(feature = "online")]
 impl From<reqwest::StatusCode> for YubicoError {
     fn from(err: reqwest::StatusCode) -> YubicoError {
         YubicoError::HTTPStatusCode(err)