diff --git a/Cargo.toml b/Cargo.toml
index d974c3b..9c1b578 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,5 +12,5 @@ unix_socket = "0.4.3"
 rustc-serialize = "0.3"
 libc = "0.2"
 dbus-serialize = "0.1"
-rand = "0.3"
+rand = "0.5"
 rust-crypto = "0.2.31"
diff --git a/src/connection.rs b/src/connection.rs
index 64634a5..327d01c 100644
--- a/src/connection.rs
+++ b/src/connection.rs
@@ -34,8 +34,8 @@ use std::cell::RefCell;
 use std::str::FromStr;
 use std::string;
 use std::num::ParseIntError;
-use rand::Rand;
 use rand;
+use rand::prelude::*;
 use libc;
 use crypto::digest::Digest;
 use crypto;
@@ -286,8 +286,9 @@ impl Connection {
         let cookie = try!(get_cookie(words[0], words[1]));
 
         let mut my_challenge = Vec::new();
+        let mut rng = rand::thread_rng();
         for _ in 0..16 {
-            my_challenge.push(u8::rand(&mut rand::thread_rng()));
+            my_challenge.push(rng.gen());
         }
         let hex_challenge = my_challenge.to_hex();