diff --git a/Cargo.toml b/Cargo.toml
index 63ac7b2..0c54031 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,3 +13,4 @@ license = "MIT"
 [dependencies]
 rand = "0.5"
 rand_core = "0.2"
+packed_simd = "0.1"
diff --git a/README.md b/README.md
index 1082b27..000be02 100644
--- a/README.md
+++ b/README.md
@@ -5,10 +5,11 @@ sfmt
 [![docs.rs](https://docs.rs/sfmt/badge.svg)](https://docs.rs/sfmt)
 [![Build Status](https://travis-ci.org/termoshtt/rust-sfmt.svg?branch=master)](https://travis-ci.org/termoshtt/rust-sfmt)
 
-Rust implementation of [SIMD-oriented Fast Mersenne Twister (SFMT)] using [stable SIMD]
+Rust implementation of [SIMD-oriented Fast Mersenne Twister (SFMT)]
 
 [SIMD-oriented Fast Mersenne Twister (SFMT)]: http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/SFMT/
-[stable SIMD]: https://github.com/rust-lang/rfcs/blob/master/text/2325-stable-simd.md
+
+Be sure that this crate works only on nightly due to [packed_simd](https://github.com/rust-lang-nursery/packed_simd).
 
 License
 --------
diff --git a/src/lib.rs b/src/lib.rs
index efa8f2d..7063645 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,16 +12,15 @@
 //! println!("random u32 number = {}", r);
 //! ```
 
-#![feature(stdsimd)]
-
+extern crate packed_simd;
 extern crate rand;
 extern crate rand_core;
 
 mod sfmt;
 mod thread_rng;
 
+use packed_simd::*;
 use rand_core::{impls, Error, RngCore, SeedableRng};
-use std::simd::*;
 
 pub use thread_rng::{thread_rng, ThreadRng};
 
diff --git a/src/sfmt.rs b/src/sfmt.rs
index 088b6d5..4cdaeeb 100644
--- a/src/sfmt.rs
+++ b/src/sfmt.rs
@@ -1,6 +1,6 @@
 //! Rust re-implementation of SFMT
 
-use std::simd::{i32x4, u32x4};
+use packed_simd::{i32x4, u32x4};
 
 use super::SFMT;