diff --git a/Cargo.toml b/Cargo.toml
index 32dfb8236..383b01eec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "tcod"
 description = "The Rust bindings for the Doryen library (a.k.a. libtcod)."
-version = "0.4.6"
+version = "0.4.7"
 homepage = "https://github.com/tomassedovic/tcod-rs"
 repository = "https://github.com/tomassedovic/tcod-rs"
 readme = "README.md"
@@ -25,7 +25,10 @@ bitflags = "0.1"
 
 [dependencies.tcod-sys]
 path = "tcod-sys"
-version = "2.0.3"
+version = "2.0.4"
+
+[dev-dependencies]
+rand = "0.1.2"
 
 # TODO: temporarily disabling debuginfo until this is fixed:
 # https://github.com/rust-lang/rust/issues/17257
diff --git a/examples/astar-path-finding.rs b/examples/astar-path-finding.rs
index e39fc88d5..9bea1bf94 100644
--- a/examples/astar-path-finding.rs
+++ b/examples/astar-path-finding.rs
@@ -1,3 +1,5 @@
+#![feature(core)]
+
 extern crate tcod;
 
 use tcod::AStarPath;
@@ -14,7 +16,7 @@ fn create_path() -> AStarPath<'static> {
         [0, 1, 0, 1, 0, 1, 0, 1],
     ];
     // Movement like in Checkers: you can only move to the square of the same colour
-    let can_move = move |&mut: from: (i32, i32), to: (i32, i32)| -> f32 {
+    let can_move = move |from: (i32, i32), to: (i32, i32)| -> f32 {
         let (fx, fy) = from;
         let (tx, ty) = to;
         if chess_board[fy as usize][fx as usize] == chess_board[ty as usize][tx as usize] {
diff --git a/examples/dijkstra-path-finding.rs b/examples/dijkstra-path-finding.rs
index 380477d20..440354ca7 100644
--- a/examples/dijkstra-path-finding.rs
+++ b/examples/dijkstra-path-finding.rs
@@ -1,3 +1,5 @@
+#![feature(core)]
+
 extern crate tcod;
 
 use tcod::DijkstraPath;
@@ -14,7 +16,7 @@ fn create_path() -> DijkstraPath<'static> {
         [0, 1, 0, 1, 0, 1, 0, 1],
     ];
     // Movement like in Checkers: you can only move to the square of the same colour
-    let can_move = move |&mut: from: (i32, i32), to: (i32, i32)| -> f32 {
+    let can_move = move |from: (i32, i32), to: (i32, i32)| -> f32 {
         let (fx, fy) = from;
         let (tx, ty) = to;
         if chess_board[fy as usize][fx as usize] == chess_board[ty as usize][tx as usize] {
diff --git a/examples/fov.rs b/examples/fov.rs
index d9f488e09..efc120d43 100644
--- a/examples/fov.rs
+++ b/examples/fov.rs
@@ -1,9 +1,8 @@
-#![feature(rand)]
+#![feature(core)]
 
+extern crate rand;
 extern crate tcod;
 
-use std::rand;
-
 use tcod::{Console, BackgroundFlag, FovAlgorithm, Map};
 
 // We'll use a basic structure to define our tiles.
diff --git a/tcod-sys/Cargo.toml b/tcod-sys/Cargo.toml
index ebc8c225b..72348527b 100644
--- a/tcod-sys/Cargo.toml
+++ b/tcod-sys/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "tcod-sys"
 description = "Raw FFI bindings & build script to link against libtcod."
-version = "2.0.3"
+version = "2.0.4"
 license = "WTFPL"
 homepage = "https://github.com/tomassedovic/tcod-rs"
 repository = "https://github.com/tomassedovic/tcod-rs/tree/master/tcod-sys"