diff --git a/Cargo.toml b/Cargo.toml
index f06374a..c164472 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "curve25519-dalek"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Isis Lovecruft <isis@patternsinthevoid.net>",
            "Henry de Valence <hdevalence@hdevalence.ca>"]
 readme = "README.md"
diff --git a/README.md b/README.md
index 430b8b3..ef10f59 100644
--- a/README.md
+++ b/README.md
@@ -44,12 +44,16 @@ Extensive documentation is available [here](https://docs.rs/curve25519-dalek).
 To install, add the following to the dependencies section of your project's
 `Cargo.toml`:
 
-    curve25519-dalek = "^0.5"
+    curve25519-dalek = "^0.6"
 
 Then, in your library or executable source, add:
 
     extern crate curve25519_dalek
 
+On nightly Rust, using the `nightly` feature enables a radix-51 field
+arithmetic implementation using `u128`s, which is approximately twice as
+fast.
+
 ## TODO
 
 * Implement hashing to a point on the curve (Elligator).