diff --git a/Cargo.toml b/Cargo.toml
index 2005d218f4..8ac35a168c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 
 name        = "nix"
 description = "Rust friendly bindings to *nix APIs"
-version     = "0.5.0"
+version     = "0.5.1-pre"
 authors     = ["Carl Lerche <me@carllerche.com>"]
 homepage    = "https://github.com/carllerche/nix-rust"
 license     = "MIT"