diff --git a/core-foundation-sys/Cargo.toml b/core-foundation-sys/Cargo.toml
index 986606f..da29f1b 100644
--- a/core-foundation-sys/Cargo.toml
+++ b/core-foundation-sys/Cargo.toml
@@ -3,7 +3,7 @@ name = "core-foundation-sys"
 description = "Bindings to Core Foundation for OS X"
 homepage = "https://github.com/servo/core-foundation-rs"
 repository = "https://github.com/servo/core-foundation-rs"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["The Servo Project Developers"]
 license = "MIT / Apache-2.0"
 build = "build.rs"
diff --git a/core-foundation/Cargo.toml b/core-foundation/Cargo.toml
index 963974a..0be8bfb 100644
--- a/core-foundation/Cargo.toml
+++ b/core-foundation/Cargo.toml
@@ -3,13 +3,13 @@ name = "core-foundation"
 description = "Bindings to Core Foundation for OS X"
 homepage = "https://github.com/servo/core-foundation-rs"
 repository = "https://github.com/servo/core-foundation-rs"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["The Servo Project Developers"]
 license = "MIT / Apache-2.0"
 
 [dependencies.core-foundation-sys]
 path = "../core-foundation-sys"
-version = "0.3.1"
+version = "0.4.0"
 
 [dependencies]
 libc = "0.2"