diff --git a/Cargo.toml b/Cargo.toml
index c9d7ca0e9f..bfe636e522 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "redox_syscall"
-version = "0.3.5"
+version = "0.4.0"
 description = "A Rust library to access raw Redox system calls"
 license = "MIT"
 authors = ["Jeremy Soller <jackpot51@gmail.com>"]