diff --git a/CHANGELOG b/CHANGELOG
index 8b221fd..4d33139 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,8 @@
 # Changelog
 
 ## Unreleased
+
+## 0.4.0 - 2019-03-02
 ### Added
 - Line charts.
 - Box plots.
diff --git a/Cargo.toml b/Cargo.toml
index 43a3e8a..099cd1a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "plotlib"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Matt Williams <matt@milliams.com>"]
 description = "Pure Rust plotting library"
 readme = "README.md"