diff --git a/CHANGELOG.md b/CHANGELOG.md
index c38860c..18b1167 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 # Changelog
 
 
-## UNRELEASED
+## v0.4.0 (2019-07-26)
 
 ### Fixed
 
diff --git a/Cargo.lock b/Cargo.lock
index 1324036..c980355 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -246,7 +246,7 @@ dependencies = [
 
 [[package]]
 name = "mask"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "assert_cmd 0.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "assert_fs 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 77d7ba8..2387942 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mask"
-version = "0.3.1"
+version = "0.4.0"
 description = "A CLI task runner defined by a simple markdown file"
 authors = ["Jake Deichert <git@jakedeichert.com>"]
 repository = "https://github.com/jakedeichert/mask"