diff --git a/.travis.yml b/.travis.yml
index 6a7159d..dec23a8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,13 +14,17 @@
 # limitations under the License.
 
 language: rust
+
+rust:
+  - 1.0.0-beta.4
+  - nightly
+
 env:
   global:
     - secure: S0l5RmsFJgbDdzXjHsCluexb1R9RklpxZMJgr9RcieeqSqaJDPUht53yBZDyuk04/KzEbtM5yxogJd2tcv2E4EogPLL8oG77GItNc/i6jy4TLUjU28WKOMiBvYA/1rhb7f/DEQgj7DtIHP/rQGKH8goUdJfqGbk7EawP7FSxC2Y=
 script:
   - cargo build
   - cargo test
-  - cargo bench
   - cargo doc
 after_script:
   # the doc directory needs to be in the root for rust-ci
diff --git a/src/angle.rs b/src/angle.rs
index 70f30c8..e3a84b8 100644
--- a/src/angle.rs
+++ b/src/angle.rs
@@ -276,10 +276,11 @@ impl<S: BaseFloat> One for Deg<S> {
     fn one() -> Deg<S> { deg(one()) }
 }
 
+const PI_2: f64 = f64::consts::PI * 2f64;
 impl<S: BaseFloat>
 Angle<S> for Rad<S> {
     #[inline] fn from<A: Angle<S>>(theta: A) -> Rad<S> { theta.to_rad() }
-    #[inline] fn full_turn() -> Rad<S> { rad(cast(f64::consts::PI_2).unwrap()) }
+    #[inline] fn full_turn() -> Rad<S> { rad(cast(PI_2).unwrap()) }
 }
 
 impl<S: BaseFloat>
diff --git a/src/lib.rs b/src/lib.rs
index 4d2fcbd..261d681 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,7 +15,6 @@
 
 #![crate_type = "rlib"]
 #![crate_type = "dylib"]
-#![feature(plugin, core, custom_derive)]
 
 //! Computer graphics-centric math.
 //!
diff --git a/src/rotation.rs b/src/rotation.rs
index d2335dc..cf3e689 100644
--- a/src/rotation.rs
+++ b/src/rotation.rs
@@ -133,7 +133,6 @@ pub trait Rotation3<S: BaseNum>: Rotation<S, Vector3<S>, Point3<S>>
 /// matrix:
 ///
 /// ```no_run
-/// #![feature(core)]
 /// use cgmath::rad;
 /// use cgmath::Vector2;
 /// use cgmath::{Matrix, ToMatrix2};
diff --git a/src/transform.rs b/src/transform.rs
index fc41c1e..9e09f12 100644
--- a/src/transform.rs
+++ b/src/transform.rs
@@ -237,7 +237,7 @@ impl<S: BaseFloat + 'static> Transform3<S> for AffineMatrix3<S> {}
 
 /// A trait that allows extracting components (rotation, translation, scale)
 /// from an arbitrary transformations
-pub trait ToComponents<S, V: Vector<S>, P: Point<S, V>, R: Rotation<S, V, P>> {
+pub trait ToComponents<S: BaseNum, V: Vector<S>, P: Point<S, V>, R: Rotation<S, V, P>> {
     /// Extract the (scale, rotation, translation) triple
     fn decompose(&self) -> (V, R, V);
 }