diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24b66b3..d715d73 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ versioning: [SemVer](https://semver.org/).
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-10-20
+
 ### Changed
 - The `otf-pixels-codec-jxl` README follows the other codec crates'
   layout and records what decodes and encodes, what does not yet, where
diff --git a/Cargo.lock b/Cargo.lock
index c38fbbf..17f9371 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -86,7 +86,7 @@ dependencies = [
 
 [[package]]
 name = "otf-pixels"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "fast_image_resize",
  "image",
@@ -104,14 +104,14 @@ dependencies = [
 
 [[package]]
 name = "otf-pixels-codec-avif"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-core",
 ]
 
 [[package]]
 name = "otf-pixels-codec-gif"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-compress",
  "otf-pixels-core",
@@ -119,21 +119,21 @@ dependencies = [
 
 [[package]]
 name = "otf-pixels-codec-jpeg"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-core",
 ]
 
 [[package]]
 name = "otf-pixels-codec-jxl"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-core",
 ]
 
 [[package]]
 name = "otf-pixels-codec-png"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-compress",
  "otf-pixels-core",
@@ -141,14 +141,14 @@ dependencies = [
 
 [[package]]
 name = "otf-pixels-codec-raw"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-core",
 ]
 
 [[package]]
 name = "otf-pixels-codec-tiff"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-compress",
  "otf-pixels-core",
@@ -156,22 +156,22 @@ dependencies = [
 
 [[package]]
 name = "otf-pixels-codec-webp"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-core",
 ]
 
 [[package]]
 name = "otf-pixels-compress"
-version = "0.3.0"
+version = "0.4.0"
 
 [[package]]
 name = "otf-pixels-core"
-version = "0.3.0"
+version = "0.4.0"
 
 [[package]]
 name = "otf-pixels-ops"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "otf-pixels-core",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 5208929..735d504 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.3.0"
+version = "0.4.0"
 edition = "2024"
 rust-version = "1.85"
 license = "Apache-2.0"
@@ -26,19 +26,19 @@ categories = ["multimedia::images"]
 keywords = ["image", "streaming", "pipeline", "resize", "codec"]
 
 [workspace.dependencies]
-otf-pixels-core = { version = "0.3.0", path = "crates/otf-pixels-core" }
-otf-pixels-ops = { version = "0.3.0", path = "crates/otf-pixels-ops" }
-otf-pixels-codec-avif = { version = "0.3.0", path = "crates/otf-pixels-codec-avif" }
-otf-pixels-codec-gif = { version = "0.3.0", path = "crates/otf-pixels-codec-gif" }
+otf-pixels-core = { version = "0.4.0", path = "crates/otf-pixels-core" }
+otf-pixels-ops = { version = "0.4.0", path = "crates/otf-pixels-ops" }
+otf-pixels-codec-avif = { version = "0.4.0", path = "crates/otf-pixels-codec-avif" }
+otf-pixels-codec-gif = { version = "0.4.0", path = "crates/otf-pixels-codec-gif" }
 # Default features off: the codec's only feature is the deprecated no-op
 # `progressive`, and members cannot override a workspace default.
-otf-pixels-codec-jpeg = { version = "0.3.0", path = "crates/otf-pixels-codec-jpeg", default-features = false }
-otf-pixels-codec-jxl = { version = "0.3.0", path = "crates/otf-pixels-codec-jxl" }
-otf-pixels-codec-png = { version = "0.3.0", path = "crates/otf-pixels-codec-png" }
-otf-pixels-codec-tiff = { version = "0.3.0", path = "crates/otf-pixels-codec-tiff" }
-otf-pixels-codec-webp = { version = "0.3.0", path = "crates/otf-pixels-codec-webp" }
-otf-pixels-compress = { version = "0.3.0", path = "crates/otf-pixels-compress" }
-otf-pixels-codec-raw = { version = "0.3.0", path = "crates/otf-pixels-codec-raw" }
+otf-pixels-codec-jpeg = { version = "0.4.0", path = "crates/otf-pixels-codec-jpeg", default-features = false }
+otf-pixels-codec-jxl = { version = "0.4.0", path = "crates/otf-pixels-codec-jxl" }
+otf-pixels-codec-png = { version = "0.4.0", path = "crates/otf-pixels-codec-png" }
+otf-pixels-codec-tiff = { version = "0.4.0", path = "crates/otf-pixels-codec-tiff" }
+otf-pixels-codec-webp = { version = "0.4.0", path = "crates/otf-pixels-codec-webp" }
+otf-pixels-compress = { version = "0.4.0", path = "crates/otf-pixels-compress" }
+otf-pixels-codec-raw = { version = "0.4.0", path = "crates/otf-pixels-codec-raw" }
 
 [workspace.lints.rust]
 missing_docs = "deny"