diff --git a/Cargo.toml b/Cargo.toml
index 17eff46..bb5313e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,13 +8,9 @@ documentation = "https://veddan.github.io/rustdoc/concurrent-hashmap/concurrent_
 description = "A concurrent hashmap library."
 
 [dependencies.spin]
-version = '0.4.5'
+version = '0.5.2'
 default-features = false
 
-[features]
-unstable = ["spin/asm"]
-default = ["unstable"]
-
 [dev-dependencies]
 rand = '0.3.11'
 
diff --git a/examples/wordcount.rs b/examples/wordcount.rs
index 1c5223d..f647f0d 100644
--- a/examples/wordcount.rs
+++ b/examples/wordcount.rs
@@ -1,4 +1,3 @@
-#![feature(step_by)]
 extern crate concurrent_hashmap;
 
 use std::io::Read;