diff --git a/hyperdb-api/CHANGELOG.md b/hyperdb-api/CHANGELOG.md
index 5113676..f1d96a5 100644
--- a/hyperdb-api/CHANGELOG.md
+++ b/hyperdb-api/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+## [1.0.0-rc.4] - 2026-09-08
+
 ### Fixed
 
 - **IPC transport: a process that spawns several IPC `HyperProcess` instances
diff --git a/hyperdb-mcp/CHANGELOG.md b/hyperdb-mcp/CHANGELOG.md
index 9358083..41b1857 100644
--- a/hyperdb-mcp/CHANGELOG.md
+++ b/hyperdb-mcp/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+## [1.0.0-rc.4] - 2026-09-08
+
 ### Changed
 
 - **The daemon now connects to its `hyperd` engine over a local IPC channel