diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68005ff..9a137cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 ## [Unreleased]
 
+## [5.5.0] - 2024-03-27
+
+### Added
+
+- Support for writing metrics to a Parquet file.
+
+### Fixes
+
+- Updates `mio` to address RUSTSEC-2024-0019
+
 ## [5.4.0] - 2024-02-09
 
 ### Added
@@ -77,7 +87,8 @@
 - Support Momento topics.
 - Basic HTTP/1.1 and HTTP/2.0 load generation.
 
-[unreleased]: https://github.com/iopsystems/rpc-perf/compare/v5.4.0...HEAD
+[unreleased]: https://github.com/iopsystems/rpc-perf/compare/v5.5.0...HEAD
+[5.4.0]: https://github.com/iopsystems/rezolus/compare/v5.4.0...v5.5.0
 [5.4.0]: https://github.com/iopsystems/rezolus/compare/v5.3.0...v5.4.0
 [5.3.0]: https://github.com/iopsystems/rezolus/compare/v5.2.0...v5.3.0
 [5.2.0]: https://github.com/iopsystems/rezolus/compare/v5.1.0...v5.2.0
diff --git a/Cargo.lock b/Cargo.lock
index 13823a1..84f31ad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2477,7 +2477,7 @@ dependencies = [
 
 [[package]]
 name = "rpc-perf"
-version = "5.4.1-alpha.0"
+version = "5.5.0"
 dependencies = [
  "ahash",
  "async-channel",
diff --git a/Cargo.toml b/Cargo.toml
index d6387a3..e2013f9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "rpc-perf"
 description = "RPC Performance Testing"
-version = "5.4.1-alpha.0"
+version = "5.5.0"
 authors = ["Brian Martin <brian@iop.systems>"]
 edition = "2021"
 homepage = "https://github.com/iopsystems/rpc-perf"