diff --git a/Cargo.lock b/Cargo.lock
index 326b5f7..0dfde9f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -400,7 +400,7 @@ dependencies = [
 
 [[package]]
 name = "powerpack"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "goldie",
  "powerpack-detach",
@@ -410,7 +410,7 @@ dependencies = [
 
 [[package]]
 name = "powerpack-cli"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "atty",
@@ -428,7 +428,7 @@ dependencies = [
 
 [[package]]
 name = "powerpack-detach"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "libc",
  "log",
diff --git a/Cargo.toml b/Cargo.toml
index f9267ab..18495ab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "powerpack"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["Ross MacArthur <ross@macarthur.io>"]
 edition = "2018"
 description = "⚡ Supercharge your Alfred workflows by building them in Rust!"
@@ -11,7 +11,7 @@ keywords = ["alfred", "workflow"]
 categories = ["command-line-utilities"]
 
 [dependencies]
-powerpack-detach = { version = "0.3.1", path = "crates/detach", optional = true }
+powerpack-detach = { version = "0.4.0", path = "crates/detach", optional = true }
 serde = { version = "1.0.136", features = ["derive"] }
 serde_json = "1.0.78"
 
diff --git a/RELEASES.md b/RELEASES.md
index 7417f67..5927c59 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -2,7 +2,7 @@
 
 ### 0.4.0
 
-*Unreleased*
+*March 19th, 2022*
 
 #### powerpack
 
diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index 53ce1be..b8de433 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "powerpack-cli"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["Ross MacArthur <ross@macarthur.io>"]
 edition = "2018"
 description = "⚡ Supercharge your Alfred workflows by building them in Rust!"
diff --git a/crates/detach/Cargo.toml b/crates/detach/Cargo.toml
index 6e18602..9dc4f8b 100644
--- a/crates/detach/Cargo.toml
+++ b/crates/detach/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "powerpack-detach"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["Ross MacArthur <ross@macarthur.io>"]
 edition = "2018"
 description = "⚡ Detach a background process from your Alfred workflow."