diff --git a/Cargo.lock b/Cargo.lock
index 91e2ef410b..01c2dd30c0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,7 +2,7 @@
 # It is not intended for manual editing.
 [[package]]
 name = "Boa"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "criterion 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gc 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 6ac69c2530..4a5afd318c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "Boa"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Jason Williams <jase.williams@gmail.com>"]
 description = "Boa is a Javascript lexer, parser and Just-in-Time compiler written in Rust. Currently, it has support for some of the language."
 homepage = "https://github.com/jasonwilliams/boa"