diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b4c60db4..3d430b0b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Prerelease] - Unreleased
 
+## [v0.19.0] - 2026-11-04
+
 ### Added
 * `Sandbox::snapshot_with_options` takes a snapshot with `SnapshotOptions`. `SnapshotOptions::scratch_size` gives the sandbox, and later restores of the snapshot, a different scratch size. A guest can boot with the scratch its initialisation needs and run guest function calls from a snapshot with only the scratch they need, so each restore costs less. It can also give a guest more scratch than it booted with.
 * `Sandbox::scratch_allocated_bytes` returns how much scratch the guest has allocated since the sandbox was last restored or snapshotted. The guest controls the value it is read from.
@@ -459,7 +461,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 The Initial Hyperlight Release 🎉 
 
 
-[Prerelease]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.18.0...HEAD>
+[Prerelease]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.19.0...HEAD>
+[v0.19.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.18.0...v0.19.0>
 [v0.18.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.17.0...v0.18.0>
 [v0.17.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.16.0...v0.17.0>
 [v0.16.0]: <https://github.com/hyperlight-dev/hyperlight/compare/v0.15.0...v0.16.0>
diff --git a/Cargo.lock b/Cargo.lock
index cf9068788..c459ef87b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1689,7 +1689,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-common"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "anyhow",
  "arbitrary",
@@ -1713,7 +1713,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-component-csharp"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "hyperlight-component-util",
  "proc-macro2",
@@ -1721,7 +1721,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-component-macro"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "env_logger",
  "hyperlight-component-util",
@@ -1734,7 +1734,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-component-util"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "itertools 0.15.0",
  "prettyplease 0.3.0",
@@ -1767,7 +1767,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "anyhow",
  "flatbuffers",
@@ -1780,7 +1780,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest-bin"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "flatbuffers",
  "hyperlight-common",
@@ -1797,7 +1797,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest-macro"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2",
@@ -1807,7 +1807,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest-tracing"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "hyperlight-common",
  "spin",
@@ -1817,7 +1817,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-host"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "anyhow",
  "bindgen 0.73.2",
@@ -1893,7 +1893,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-libc"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "anyhow",
  "bindgen 0.73.2",
@@ -1918,7 +1918,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight_guest_capi"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "cbindgen",
  "flatbuffers",
diff --git a/Cargo.toml b/Cargo.toml
index 487fb2853..241ebfb80 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,7 @@ exclude = [
 ]
 
 [workspace.package]
-version = "0.18.0"
+version = "0.19.0"
 edition = "2024"
 rust-version = "1.89"
 license = "Apache-2.0"
@@ -39,17 +39,17 @@ repository = "https://github.com/hyperlight-dev/hyperlight"
 readme = "README.md"
 
 [workspace.dependencies]
-hyperlight-common = { path = "src/hyperlight_common", version = "0.18.0", default-features = false }
-hyperlight-host = { path = "src/hyperlight_host", version = "0.18.0", default-features = false }
-hyperlight-guest = { path = "src/hyperlight_guest", version = "0.18.0", default-features = false }
-hyperlight-guest-bin = { path = "src/hyperlight_guest_bin", version = "0.18.0", default-features = false }
-hyperlight-guest-macro = { path = "src/hyperlight_guest_macro", version = "0.18.0", default-features = false }
+hyperlight-common = { path = "src/hyperlight_common", version = "0.19.0", default-features = false }
+hyperlight-host = { path = "src/hyperlight_host", version = "0.19.0", default-features = false }
+hyperlight-guest = { path = "src/hyperlight_guest", version = "0.19.0", default-features = false }
+hyperlight-guest-bin = { path = "src/hyperlight_guest_bin", version = "0.19.0", default-features = false }
+hyperlight-guest-macro = { path = "src/hyperlight_guest_macro", version = "0.19.0", default-features = false }
 hyperlight-testing = { path = "src/hyperlight_testing", default-features = false }
-hyperlight-guest-tracing = { path = "src/hyperlight_guest_tracing", version = "0.18.0", default-features = false }
-hyperlight-libc = { path = "src/hyperlight_libc", version = "0.18.0", default-features = false }
-hyperlight-component-util = { path = "src/hyperlight_component_util", version = "0.18.0", default-features = false }
-hyperlight-component-macro = { path = "src/hyperlight_component_macro", version = "0.18.0", default-features = false }
-hyperlight-component-csharp = { path = "src/hyperlight_component_csharp", version = "0.18.0", default-features = false }
+hyperlight-guest-tracing = { path = "src/hyperlight_guest_tracing", version = "0.19.0", default-features = false }
+hyperlight-libc = { path = "src/hyperlight_libc", version = "0.19.0", default-features = false }
+hyperlight-component-util = { path = "src/hyperlight_component_util", version = "0.19.0", default-features = false }
+hyperlight-component-macro = { path = "src/hyperlight_component_macro", version = "0.19.0", default-features = false }
+hyperlight-component-csharp = { path = "src/hyperlight_component_csharp", version = "0.19.0", default-features = false }
 
 [workspace.lints.rust]
 unsafe_op_in_unsafe_fn = "deny"
diff --git a/src/hyperlight_host/src/sandbox/initialized.rs b/src/hyperlight_host/src/sandbox/initialized.rs
index 120644f10..db3b7bcec 100644
--- a/src/hyperlight_host/src/sandbox/initialized.rs
+++ b/src/hyperlight_host/src/sandbox/initialized.rs
@@ -1702,7 +1702,6 @@ mod tests {
     #[test]
     fn scratch_allocated_bytes_counts_written_pages() {
         let mut sbox = SandboxBuilder::from_file(simple_guest_as_pathbuf())
-            .heap_size(8 << 20)
             .scratch_size(16 << 20)
             .build()
             .unwrap();
diff --git a/src/tests/rust_guests/Cargo.lock b/src/tests/rust_guests/Cargo.lock
index 4d2223cb7..a4f7e454f 100644
--- a/src/tests/rust_guests/Cargo.lock
+++ b/src/tests/rust_guests/Cargo.lock
@@ -232,7 +232,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-common"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "anyhow",
  "bitflags 2.13.1",
@@ -249,7 +249,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-component-macro"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "env_logger",
  "hyperlight-component-util",
@@ -262,7 +262,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-component-util"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "itertools",
  "prettyplease",
@@ -278,7 +278,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "anyhow",
  "flatbuffers",
@@ -291,7 +291,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest-bin"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "flatbuffers",
  "hyperlight-common",
@@ -307,7 +307,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest-macro"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2",
@@ -317,7 +317,7 @@ dependencies = [
 
 [[package]]
 name = "hyperlight-guest-tracing"
-version = "0.18.0"
+version = "0.19.0"
 dependencies = [
  "hyperlight-common",
  "spin",