diff --git a/Cargo.toml b/Cargo.toml
index d474096..22580e2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,11 +3,11 @@ name = "core-graphics"
 description = "Bindings to Core Graphics for OS X"
 homepage = "https://github.com/servo/core-graphics-rs"
 repository = "https://github.com/servo/core-graphics-rs"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["The Servo Project Developers"]
 license = "MIT / Apache-2.0"
 
 [dependencies]
 libc = "0.2"
 core-foundation = "0.2"
-serde = "0.7"
+serde = "0.8"