Fix rand version in doc
diff --git a/rand-derive/README.md b/rand-derive/README.md
index 3b01cd9..3d1fedb 100644
--- a/rand-derive/README.md
+++ b/rand-derive/README.md
@@ -9,7 +9,7 @@
 
 ```toml
 [dependencies]
-rand = "0.3"
+rand = "0.4"
 rand_macros = "0.2"
 ```
 
diff --git a/src/lib.rs b/src/lib.rs
index 960a567..7b22dd4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -239,7 +239,7 @@
 
 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
        html_favicon_url = "https://www.rust-lang.org/favicon.ico",
-       html_root_url = "https://docs.rs/rand/0.3")]
+       html_root_url = "https://docs.rs/rand/0.4")]
 
 #![deny(missing_debug_implementations)]