diff --git a/Cargo.toml b/Cargo.toml
index 9baa310..7ae8f4d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "weak-table"
-version = "0.4.0-pre3"
+version = "0.4.0"
 authors = ["Jesse A. Tov <jesse.tov@gmail.com>", "Nick Mathewson <nickm@torproject.org>"]
 description = "Weak hash maps and sets"
 repository = "https://github.com/tov/weak-table-rs"