diff --git a/Cargo.toml b/Cargo.toml
index c6cdad0..d84ce77 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "csscolorparser"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Nor Khasyatillah <mazznoer@ymail.com>"]
 edition = "2018"
 description = "CSS color parser library"
diff --git a/README.md b/README.md
index f0a39f9..49b8a16 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ Add `csscolorparser` to your `Cargo.toml`
 
 ```toml
 [dependencies]
-csscolorparser = "0.3.0"
+csscolorparser = "0.4.0"
 ```
 
 ## Examples
diff --git a/src/lib.rs b/src/lib.rs
index 7062a8e..2c1646a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -55,7 +55,7 @@
 //!
 //! ```toml
 //! [dependencies]
-//! csscolorparser = "0.3.0"
+//! csscolorparser = "0.4.0"
 //! ```
 //!
 //! ## Examples