diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 816df2d..2537c1f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.1"
+  ".": "0.4.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc2d818..53e48c8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [0.4.0](https://github.com/tableau/hyper-api-rust/compare/v0.3.1...v0.4.0) (2026-06-02)
+
+
+### Features
+
+* streaming FromRow mapping (stream_as) — constant-memory struct-mapped queries ([#91](https://github.com/tableau/hyper-api-rust/issues/91)) ([#94](https://github.com/tableau/hyper-api-rust/issues/94)) ([3327fc0](https://github.com/tableau/hyper-api-rust/commit/3327fc0fd8d61faaa55b8d5ae2922ff7284348c5))
+* opt-in compile-time SQL validation — `query_as!` / `query_scalar!` validate SQL against `#[derive(Table)]` structs at build time, with VS Code diagnostics ([#93](https://github.com/tableau/hyper-api-rust/issues/93)) ([73f9b0f](https://github.com/tableau/hyper-api-rust/commit/73f9b0f))
+
+
+### Bug Fixes
+
+* **release:** wrap hyperdb-compile-check pin in release-please markers ([#97](https://github.com/tableau/hyper-api-rust/issues/97)) ([1f07015](https://github.com/tableau/hyper-api-rust/commit/1f07015d9c26cd85fe1f722b8ef5d7c52464cd8c))
+
 ## [0.3.1](https://github.com/tableau/hyper-api-rust/compare/v0.3.0...v0.3.1) (2026-05-29)
 
 Patch release that fixes two related but distinct bugs surfaced by [#84](https://github.com/tableau/hyper-api-rust/issues/84) — wrong NUMERIC values in MCP query results and Node bindings.
diff --git a/Cargo.lock b/Cargo.lock
index 448308e..54af4ae 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1845,7 +1845,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "arrow",
  "async-stream",
@@ -1870,7 +1870,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-core"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "arrow",
  "base64",
@@ -1910,7 +1910,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-derive"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "hyperdb-api",
  "hyperdb-compile-check",
@@ -1922,7 +1922,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-node"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "hyperdb-api",
  "napi",
@@ -1934,7 +1934,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-salesforce"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "arrow",
  "base64",
@@ -1955,7 +1955,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-bootstrap"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "anyhow",
  "clap",
@@ -1973,7 +1973,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-compile-check"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "hyperdb-api",
  "parking_lot",
@@ -1982,7 +1982,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-mcp"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "arrow",
  "base64",
@@ -3829,7 +3829,7 @@ dependencies = [
 
 [[package]]
 name = "sea-query-hyperdb"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "sea-query",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index d510906..a2aa335 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ exclude = ["hyperdb-compile-check"]
 # `cargo build --manifest-path hyperdb-compile-check/Cargo.toml`.
 
 [workspace.package]
-version = "0.3.1"
+version = "0.4.0"
 edition = "2021"
 rust-version = "1.81"
 license = "MIT OR Apache-2.0"
diff --git a/hyperdb-api-core/Cargo.toml b/hyperdb-api-core/Cargo.toml
index 9187f41..47bdc38 100644
--- a/hyperdb-api-core/Cargo.toml
+++ b/hyperdb-api-core/Cargo.toml
@@ -65,7 +65,7 @@ serde_json = { workspace = true }
 
 # Salesforce OAuth authentication (optional, via standalone crate)
 # x-release-please-start-version
-hyperdb-api-salesforce = { path = "../hyperdb-api-salesforce", version = "=0.3.1", optional = true }
+hyperdb-api-salesforce = { path = "../hyperdb-api-salesforce", version = "=0.4.0", optional = true }
 # x-release-please-end
 
 # Arrow parsing for catalog operations (optional, used by authenticated_client)
diff --git a/hyperdb-api-derive/Cargo.toml b/hyperdb-api-derive/Cargo.toml
index 24f7225..1857c3a 100644
--- a/hyperdb-api-derive/Cargo.toml
+++ b/hyperdb-api-derive/Cargo.toml
@@ -27,12 +27,12 @@ syn = { version = "2", features = ["full"] }
 quote = "1"
 proc-macro2 = "1"
 # x-release-please-start-version
-hyperdb-compile-check = { path = "../hyperdb-compile-check", version = "=0.3.1", optional = true }
+hyperdb-compile-check = { path = "../hyperdb-compile-check", version = "=0.4.0", optional = true }
 # x-release-please-end
 
 [dev-dependencies]
 # x-release-please-start-version
-hyperdb-api = { path = "../hyperdb-api", version = "=0.3.1" }
+hyperdb-api = { path = "../hyperdb-api", version = "=0.4.0" }
 # x-release-please-end
 trybuild = { version = "1", features = ["diff"] }
 
diff --git a/hyperdb-api/Cargo.toml b/hyperdb-api/Cargo.toml
index b243bf2..4be319c 100644
--- a/hyperdb-api/Cargo.toml
+++ b/hyperdb-api/Cargo.toml
@@ -14,7 +14,7 @@ autobenches = false
 
 [dependencies]
 # x-release-please-start-version
-hyperdb-api-core = { path = "../hyperdb-api-core", version = "=0.3.1" }
+hyperdb-api-core = { path = "../hyperdb-api-core", version = "=0.4.0" }
 # x-release-please-end
 # NOTE: hyperdb-api-derive is intentionally NOT a dep of hyperdb-api.
 # Adding it creates a cycle:
@@ -49,7 +49,7 @@ workspace = true
 
 [dev-dependencies]
 # x-release-please-start-version
-hyperdb-api-derive = { path = "../hyperdb-api-derive", version = "=0.3.1" }
+hyperdb-api-derive = { path = "../hyperdb-api-derive", version = "=0.4.0" }
 # x-release-please-end
 tempfile = { workspace = true }
 libc = "0.2"
diff --git a/hyperdb-compile-check/Cargo.toml b/hyperdb-compile-check/Cargo.toml
index 415039a..b1003bc 100644
--- a/hyperdb-compile-check/Cargo.toml
+++ b/hyperdb-compile-check/Cargo.toml
@@ -7,7 +7,7 @@
 [package]
 name = "hyperdb-compile-check"
 # x-release-please-start-version
-version = "0.3.1"
+version = "0.4.0"
 # x-release-please-end
 edition = "2021"
 rust-version = "1.81"
@@ -25,7 +25,7 @@ categories = ["database", "development-tools"]
 
 [dependencies]
 # x-release-please-start-version
-hyperdb-api = { path = "../hyperdb-api", version = "=0.3.1" }
+hyperdb-api = { path = "../hyperdb-api", version = "=0.4.0" }
 # x-release-please-end
 parking_lot = "0.12"
 tempfile = "3.20"
diff --git a/hyperdb-mcp/Cargo.toml b/hyperdb-mcp/Cargo.toml
index 0189004..d565630 100644
--- a/hyperdb-mcp/Cargo.toml
+++ b/hyperdb-mcp/Cargo.toml
@@ -21,7 +21,7 @@ path = "src/main.rs"
 
 [dependencies]
 # x-release-please-start-version
-hyperdb-api = { path = "../hyperdb-api", version = "=0.3.1" }
+hyperdb-api = { path = "../hyperdb-api", version = "=0.4.0" }
 # x-release-please-end
 rmcp = { version = "1.7", features = ["server", "transport-io"] }
 tokio = { version = "1", features = ["rt-multi-thread", "macros", "io-std", "signal", "time"] }
diff --git a/version.txt b/version.txt
index 9e11b32..1d0ba9e 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.3.1
+0.4.0