diff --git a/Cargo.lock b/Cargo.lock
index 7a799a4..ceb2eb2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,15 +2,15 @@
 name = "secretshare"
 version = "0.1.3"
 dependencies = [
- "crc24 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc24 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "crc24"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -33,7 +33,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "rand"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -42,6 +42,6 @@ dependencies = [
 
 [[package]]
 name = "rustc-serialize"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
diff --git a/Cargo.toml b/Cargo.toml
index 590fce2..062673a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "secretshare"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["Sebastian Gesemann <s.gesemann@gmail.com>"]
 description = "This is an implementation of Shamir's secret sharing scheme."
 license = "GPLv3"
diff --git a/src/gf256.rs b/src/gf256.rs
index 8d7b86c..fd6b060 100644
--- a/src/gf256.rs
+++ b/src/gf256.rs
@@ -39,13 +39,13 @@ fn get_tables() -> &'static Tables {
 		// mutable access is fine because of synchronization via INIT
 		let tabs = unsafe { &mut TABLES };
 		let mut tmp = 1;
-		for power in 0..255us {
+		for power in 0..255usize {
 			tabs.exp[power] = tmp;
 			tabs.log[tmp as usize] = power as u8;
 			tmp = xtimes(tmp);
 		}
 		tabs.exp[255] = 1;
-		for x in 1..256us {
+		for x in 1..256usize {
 			let l = tabs.log[x];
 			let nl = if l==0 { 0 } else { 255 - l };
 			let i = tabs.exp[nl as usize];
diff --git a/src/main.rs b/src/main.rs
index 463f871..5a58b58 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,6 @@
 #![feature(collections)]
 #![feature(core)]
-#![feature(io)]
+#![feature(old_io)]
 #![feature(env)]
 #![feature(hash)]
 
@@ -149,7 +149,7 @@ fn read_no_more_than<R: Reader>(r: &mut R, max: usize) -> IoResult<Vec<u8>> {
 /// computes a CRC-24 hash over the concatenated coding parameters k, n
 /// and the raw share data
 fn crc24_as_bytes(k: u8, n: u8, octets: &[u8]) -> [u8; 3] {
-	use std::hash::{ Hasher, Writer };
+	use std::hash::Hasher;
 	use std::slice::ref_slice;
 
 	let mut h = crc24::Crc24Hasher::new();