diff --git a/CHANGELOG.md b/CHANGELOG.md
index 101ed1c712..f602f042e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 ## [[UnreleasedUniFFIVersion]] (backend crates: [[UnreleasedBackendVersion]]) - (_[[ReleaseDate]]_)
 
+[All changes in [[UnreleasedUniFFIVersion]]](https://github.com/mozilla/uniffi-rs/compare/v0.27.0...HEAD).
+
+## v0.27.0 (backend crates: v0.27.0) - (_2024-03-26_)
+
 ### What's new?
 
 - Constructors can be async. Alternate constructors work in Python, Kotlin and Swift;
@@ -54,7 +58,7 @@
   - Rust future continuation data (Replacing `FfiType::RustFutureContinuationData` which was moved).
 - `RustBuffer.len` and `RustBuffer.capacity` are now `u64` rather than `i32`.
 
-[All changes in [[UnreleasedUniFFIVersion]]](https://github.com/mozilla/uniffi-rs/compare/v0.26.1...HEAD).
+[All changes in v0.27.0](https://github.com/mozilla/uniffi-rs/compare/v0.26.1...v0.27.0).
 
 ## v0.26.1 (backend crates: v0.26.1) - (_2024-01-24_)
 
diff --git a/Cargo.lock b/Cargo.lock
index 4df0b603f1..332a54002e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1494,7 +1494,7 @@ checksum = "e51733f11c9c4f72aa0c160008246859e340b00807569a0da0e7a1079b27ba85"
 
 [[package]]
 name = "uniffi"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "anyhow",
  "camino",
@@ -1938,7 +1938,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_bindgen"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "anyhow",
  "askama",
@@ -1961,7 +1961,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_build"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "anyhow",
  "camino",
@@ -1970,7 +1970,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_checksum_derive"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "quote",
  "syn",
@@ -1978,7 +1978,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_core"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "anyhow",
  "async-compat",
@@ -1993,7 +1993,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_macros"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "bincode",
  "camino",
@@ -2010,7 +2010,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_meta"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "anyhow",
  "bytes",
@@ -2020,7 +2020,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_testing"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "anyhow",
  "camino",
@@ -2031,7 +2031,7 @@ dependencies = [
 
 [[package]]
 name = "uniffi_udl"
-version = "0.26.1"
+version = "0.27.0"
 dependencies = [
  "anyhow",
  "textwrap",
diff --git a/Cargo.toml b/Cargo.toml
index b7b42279e3..96327cb799 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -73,4 +73,4 @@ members = [
 resolver = "2"
 
 [workspace.dependencies]
-uniffi = { path = "./uniffi", version = "0.26" }
+uniffi = { path = "./uniffi", version = "0.27" }
diff --git a/uniffi/Cargo.toml b/uniffi/Cargo.toml
index ffd899795d..8155bc62fa 100644
--- a/uniffi/Cargo.toml
+++ b/uniffi/Cargo.toml
@@ -7,7 +7,7 @@ repository = "https://github.com/mozilla/uniffi-rs"
 # Incrementing the minor version here means a breaking change to consumers.
 #   * See `docs/uniffi-versioning.md` for guidance on when to increment this
 #   * Make sure to also update `uniffi_bindgen::UNIFFI_CONTRACT_VERSION"
-version = "0.26.1"
+version = "0.27.0"
 authors = ["Firefox Sync Team <sync-team@mozilla.com>"]
 license = "MPL-2.0"
 edition = "2021"
@@ -15,10 +15,10 @@ keywords = ["ffi", "bindgen"]
 readme = "../README.md"
 
 [dependencies]
-uniffi_bindgen = { path = "../uniffi_bindgen", version = "=0.26.1", optional = true }
-uniffi_build = { path = "../uniffi_build", version = "=0.26.1", optional = true }
-uniffi_core = { path = "../uniffi_core", version = "=0.26.1" }
-uniffi_macros = { path = "../uniffi_macros", version = "=0.26.1" }
+uniffi_bindgen = { path = "../uniffi_bindgen", version = "=0.27.0", optional = true }
+uniffi_build = { path = "../uniffi_build", version = "=0.27.0", optional = true }
+uniffi_core = { path = "../uniffi_core", version = "=0.27.0" }
+uniffi_macros = { path = "../uniffi_macros", version = "=0.27.0" }
 anyhow = "1"
 camino = { version = "1.0.8", optional = true }
 clap = { version = "4", features = ["cargo", "std", "derive"], optional = true }
diff --git a/uniffi_bindgen/Cargo.toml b/uniffi_bindgen/Cargo.toml
index 816c283f29..1bb70d3355 100644
--- a/uniffi_bindgen/Cargo.toml
+++ b/uniffi_bindgen/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniffi_bindgen"
-version = "0.26.1"
+version = "0.27.0"
 authors = ["Firefox Sync Team <sync-team@mozilla.com>"]
 description = "a multi-language bindings generator for rust (codegen and cli tooling)"
 documentation = "https://mozilla.github.io/uniffi-rs"
@@ -24,8 +24,8 @@ once_cell = "1.12"
 paste = "1.0"
 serde = { version = "1", features = ["derive"] }
 toml = "0.5"
-uniffi_meta = { path = "../uniffi_meta", version = "=0.26.1" }
-uniffi_testing = { path = "../uniffi_testing", version = "=0.26.1" }
-uniffi_udl = { path = "../uniffi_udl", version = "=0.26.1" }
+uniffi_meta = { path = "../uniffi_meta", version = "=0.27.0" }
+uniffi_testing = { path = "../uniffi_testing", version = "=0.27.0" }
+uniffi_udl = { path = "../uniffi_udl", version = "=0.27.0" }
 clap = { version = "4", default-features = false, features = ["std", "derive"], optional = true }
 textwrap = "0.16"
diff --git a/uniffi_build/Cargo.toml b/uniffi_build/Cargo.toml
index edc8b3f783..aefbb1bf57 100644
--- a/uniffi_build/Cargo.toml
+++ b/uniffi_build/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniffi_build"
-version = "0.26.1"
+version = "0.27.0"
 authors = ["Firefox Sync Team <sync-team@mozilla.com>"]
 description = "a multi-language bindings generator for rust (build script helpers)"
 documentation = "https://mozilla.github.io/uniffi-rs"
@@ -14,7 +14,7 @@ readme = "../README.md"
 [dependencies]
 anyhow = "1"
 camino = "1.0.8"
-uniffi_bindgen = { path = "../uniffi_bindgen", default-features = false, version = "=0.26.1" }
+uniffi_bindgen = { path = "../uniffi_bindgen", default-features = false, version = "=0.27.0" }
 
 [features]
 default = []
diff --git a/uniffi_checksum_derive/Cargo.toml b/uniffi_checksum_derive/Cargo.toml
index 41794604fe..f57daa8e4f 100644
--- a/uniffi_checksum_derive/Cargo.toml
+++ b/uniffi_checksum_derive/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniffi_checksum_derive"
-version = "0.26.1"
+version = "0.27.0"
 authors = ["Firefox Sync Team <sync-team@mozilla.com>"]
 description = "a multi-language bindings generator for rust (checksum custom derive)"
 documentation = "https://mozilla.github.io/uniffi-rs"
diff --git a/uniffi_core/Cargo.toml b/uniffi_core/Cargo.toml
index 1632cc2af9..78a196c5aa 100644
--- a/uniffi_core/Cargo.toml
+++ b/uniffi_core/Cargo.toml
@@ -4,7 +4,7 @@ description = "a multi-language bindings generator for rust (runtime support cod
 documentation = "https://mozilla.github.io/uniffi-rs"
 homepage = "https://mozilla.github.io/uniffi-rs"
 repository = "https://github.com/mozilla/uniffi-rs"
-version = "0.26.1"
+version = "0.27.0"
 authors = ["Firefox Sync Team <sync-team@mozilla.com>"]
 license = "MPL-2.0"
 edition = "2021"
diff --git a/uniffi_macros/Cargo.toml b/uniffi_macros/Cargo.toml
index e121dd8853..20ed498aa1 100644
--- a/uniffi_macros/Cargo.toml
+++ b/uniffi_macros/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniffi_macros"
-version = "0.26.1"
+version = "0.27.0"
 authors = ["Firefox Sync Team <sync-team@mozilla.com>"]
 description = "a multi-language bindings generator for rust (convenience macros)"
 documentation = "https://mozilla.github.io/uniffi-rs"
@@ -24,8 +24,8 @@ quote = "1.0"
 serde = { version = "1.0.136", features = ["derive"] }
 syn = { version = "2.0", features = ["full", "visit-mut"] }
 toml = "0.5.9"
-uniffi_build = { path = "../uniffi_build", version = "=0.26.1", optional = true }
-uniffi_meta = { path = "../uniffi_meta", version = "=0.26.1" }
+uniffi_build = { path = "../uniffi_build", version = "=0.27.0", optional = true }
+uniffi_meta = { path = "../uniffi_meta", version = "=0.27.0" }
 
 [features]
 default = []
diff --git a/uniffi_meta/Cargo.toml b/uniffi_meta/Cargo.toml
index e2469327d7..dbf5a676de 100644
--- a/uniffi_meta/Cargo.toml
+++ b/uniffi_meta/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniffi_meta"
-version = "0.26.1"
+version = "0.27.0"
 edition = "2021"
 description = "uniffi_meta"
 homepage = "https://mozilla.github.io/uniffi-rs"
@@ -13,4 +13,4 @@ readme = "../README.md"
 anyhow = "1"
 bytes = "1.3"
 siphasher = "0.3"
-uniffi_checksum_derive = { version = "0.26.1", path = "../uniffi_checksum_derive" }
+uniffi_checksum_derive = { version = "0.27.0", path = "../uniffi_checksum_derive" }
diff --git a/uniffi_testing/Cargo.toml b/uniffi_testing/Cargo.toml
index 97c394baa7..04aac916d5 100644
--- a/uniffi_testing/Cargo.toml
+++ b/uniffi_testing/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniffi_testing"
-version = "0.26.1"
+version = "0.27.0"
 authors = ["Firefox Sync Team <sync-team@mozilla.com>"]
 description = "a multi-language bindings generator for rust (testing helpers)"
 documentation = "https://mozilla.github.io/uniffi-rs"
diff --git a/uniffi_udl/Cargo.toml b/uniffi_udl/Cargo.toml
index 96235758d0..507b460baf 100644
--- a/uniffi_udl/Cargo.toml
+++ b/uniffi_udl/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniffi_udl"
-version = "0.26.1"
+version = "0.27.0"
 description = "udl parsing for the uniffi project"
 documentation = "https://mozilla.github.io/uniffi-rs"
 homepage = "https://mozilla.github.io/uniffi-rs"
@@ -14,5 +14,5 @@ readme = "../README.md"
 anyhow = "1"
 weedle2 = { version = "5.0.0", path = "../weedle2" }
 textwrap = "0.16"
-uniffi_meta = { path = "../uniffi_meta", version = "=0.26.1" }
-uniffi_testing = { path = "../uniffi_testing", version = "=0.26.1" }
+uniffi_meta = { path = "../uniffi_meta", version = "=0.27.0" }
+uniffi_testing = { path = "../uniffi_testing", version = "=0.27.0" }