diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7b99ad..f46cdcd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ namespace) is unstable and may change between minor releases until the API freez
 
 ## [Unreleased]
 
+## [0.12.0] - 2026-07-28
+
 ### Changed
 
 - **`URLPattern` is now spec-conformant: 369/369 on the official WPT suite.**
diff --git a/Cargo.lock b/Cargo.lock
index 5ab1012..6a6da9c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -777,7 +777,7 @@ dependencies = [
 
 [[package]]
 name = "es-runtime"
-version = "0.11.0"
+version = "0.12.0"
 dependencies = [
  "aes",
  "aes-gcm",
@@ -817,7 +817,7 @@ dependencies = [
 
 [[package]]
 name = "es-runtime-cli"
-version = "0.11.0"
+version = "0.12.0"
 dependencies = [
  "es-runtime",
  "es-runtime-common",
@@ -831,7 +831,7 @@ dependencies = [
 
 [[package]]
 name = "es-runtime-common"
-version = "0.11.0"
+version = "0.12.0"
 dependencies = [
  "thiserror",
  "tracing",
@@ -840,7 +840,7 @@ dependencies = [
 
 [[package]]
 name = "es-runtime-default-providers"
-version = "0.11.0"
+version = "0.12.0"
 dependencies = [
  "bytes",
  "dunce",
@@ -868,7 +868,7 @@ dependencies = [
 
 [[package]]
 name = "es-runtime-engine"
-version = "0.11.0"
+version = "0.12.0"
 dependencies = [
  "es-runtime-common",
  "thiserror",
@@ -878,7 +878,7 @@ dependencies = [
 
 [[package]]
 name = "es-runtime-providers"
-version = "0.11.0"
+version = "0.12.0"
 dependencies = [
  "es-runtime-common",
  "futures-core",
diff --git a/Cargo.toml b/Cargo.toml
index 9e0eb83..97a2daa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ members = [
 # (engine `Engine`/`Value`, `Runtime`, provider traits) and the `runtime:`
 # standard-module namespace are the versioned contract.
 [workspace.package]
-version = "0.11.0"
+version = "0.12.0"
 edition = "2024"
 rust-version = "1.95"
 license = "Apache-2.0"
@@ -151,11 +151,11 @@ self_update = { version = "1.0.0-rc.6", default-features = false, features = [
 
 # Internal crates, referenced by path so the dependency graph is the boundary
 # (DECISIONS.md D11).
-es-runtime-common = { path = "crates/common", version = "0.11.0" }
-es-runtime-engine = { path = "crates/engine", version = "0.11.0" }
-es-runtime-providers = { path = "crates/providers", version = "0.11.0" }
-es-runtime = { path = "crates/runtime", version = "0.11.0" }
-es-runtime-default-providers = { path = "crates/default-providers", version = "0.11.0" }
+es-runtime-common = { path = "crates/common", version = "0.12.0" }
+es-runtime-engine = { path = "crates/engine", version = "0.12.0" }
+es-runtime-providers = { path = "crates/providers", version = "0.12.0" }
+es-runtime = { path = "crates/runtime", version = "0.12.0" }
+es-runtime-default-providers = { path = "crates/default-providers", version = "0.12.0" }
 # Debug info dominates `target/` disk on a V8-sized dependency graph (tens of
 # GB). Keep it lean: our own crates keep line tables so panic backtraces still
 # resolve to file:line; dependencies — the bulk, rarely stepped through — carry