diff --git a/README.md b/README.md
index 802e4c8a5..d407d928c 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ To use `mio`, first add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-mio = "0.3.0"
+mio = "0.4"
 ```
 
 Then, add this to your crate root: