diff --git a/Cargo.toml b/Cargo.toml
index c8b052b..c30f06a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name = "cpal"
-version = "0.0.17"
+version = "0.0.18"
 authors = ["Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform audio playing library in pure Rust."
 repository = "https://github.com/tomaka/cpal"
@@ -19,10 +19,10 @@ version = "0"
 version = "0"
 
 [target.i686-pc-windows-gnu.dependencies.ole32-sys]
-version = "0"
+version = "0.1"
 
 [target.x86_64-pc-windows-gnu.dependencies.ole32-sys]
-version = "0"
+version = "0.1"
 
 [target.i686-unknown-linux-gnu.dependencies.alsa-sys]
 version = "0"
diff --git a/src/alsa/mod.rs b/src/alsa/mod.rs
index 9c40dc5..53d5d0d 100644
--- a/src/alsa/mod.rs
+++ b/src/alsa/mod.rs
@@ -87,7 +87,7 @@ impl Drop for Voice {
 
 impl<'a, T> Buffer<'a, T> {
     pub fn get_buffer<'b>(&'b mut self) -> &'b mut [T] {
-        self.buffer.as_mut_slice()
+        &mut self.buffer
     }
 
     pub fn finish(self) {
diff --git a/src/lib.rs b/src/lib.rs
index c598016..b53e742 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,7 +48,6 @@ If you have the possibility, you should try to match the format of the voice.
 
 */
 #![feature(box_syntax, core, unsafe_destructor, thread_sleep, std_misc)]
-#![unstable]
 
 pub use samples_formats::{SampleFormat, Sample};
 
@@ -99,7 +98,7 @@ pub struct SamplesRate(pub u32);
 /// You should destroy this object as soon as possible. Data is only committed when it
 /// is destroyed.
 #[must_use]
-pub struct Buffer<'a, T: 'a> {
+pub struct Buffer<'a, T: 'a> where T: Sample {
     // also contains something, taken by `Drop`
     target: Option<cpal_impl::Buffer<'a, T>>, 
 
@@ -244,7 +243,7 @@ impl Voice {
     }
 }
 
-impl<'a, T> Deref for Buffer<'a, T> {
+impl<'a, T> Deref for Buffer<'a, T> where T: Sample {
     type Target = [T];
 
     fn deref(&self) -> &[T] {
@@ -252,10 +251,10 @@ impl<'a, T> Deref for Buffer<'a, T> {
     }
 }
 
-impl<'a, T> DerefMut for Buffer<'a, T> {
+impl<'a, T> DerefMut for Buffer<'a, T> where T: Sample {
     fn deref_mut(&mut self) -> &mut [T] {
         if let Some(ref mut conversion) = self.conversion {
-            conversion.intermediate_buffer.as_mut_slice()
+            &mut conversion.intermediate_buffer
         } else {
             self.target.as_mut().unwrap().get_buffer()
         }
diff --git a/src/wasapi/mod.rs b/src/wasapi/mod.rs
index bb43d65..e96c401 100644
--- a/src/wasapi/mod.rs
+++ b/src/wasapi/mod.rs
@@ -1,6 +1,6 @@
 extern crate libc;
 extern crate winapi;
-extern crate ole32_sys as ole32;
+extern crate ole32;
 
 use std::{slice, mem, ptr};
 use std::marker::PhantomData;