diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c3d478..49b1175 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 4.0.0
+
+- [[#327](https://github.com/IronCoreLabs/ironoxide/pull/327)]
+  - Reuse the reqwest `Client` for all calls. This increases performance significantly if making multiple calls with the same IronOxide.
+  - Change `DeviceContext` to `BlockingDeviceContext` for the blocking api. This allows the reuse of the runtime for all calls.
+
 ## 3.0.0
 
 - [[#321](https://github.com/IronCoreLabs/ironoxide/issues/321)]
diff --git a/Cargo.toml b/Cargo.toml
index e5092fe..cc50435 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ironoxide"
-version = "3.0.0"
+version = "4.0.0"
 authors = ["IronCore Labs <info@ironcorelabs.com>"]
 readme = "README.md"
 license = "AGPL-3.0-only"