diff --git a/uapi/Cargo.toml b/uapi/Cargo.toml
index 5fe951d5..ccab9c69 100644
--- a/uapi/Cargo.toml
+++ b/uapi/Cargo.toml
@@ -3,11 +3,11 @@
 
 [package]
 name = "sentry-uapi"
-version = "0.4.0"
+version = "0.4.1"
 edition = "2021"
-license = "Apache 2.0"
+license = "Apache-2.0"
 description = "Sentry kernel user API implementation"
-categories = ["os::api"]
+categories = ["os", "no-std"]
 
 [dependencies]
 
diff --git a/uapi/README.md b/uapi/README.md
new file mode 100644
index 00000000..c41346b6
--- /dev/null
+++ b/uapi/README.md
@@ -0,0 +1,27 @@
+<!--
+SPDX-FileCopyrightText: 2023-2024 Ledger SAS
+SPDX-License-Identifier: Apache-2.0
+-->
+
+# UAPI for Outpost-OS Sentry kernel
+
+[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/9667/badge)](https://www.bestpractices.dev/projects/9667)
+[![Documentation Status](https://readthedocs.org/projects/outpost-sentry/badge/?version=latest)](https://outpost-sentry.readthedocs.io/en/latest/?badge=latest)
+![GitHub Release](https://img.shields.io/github/v/release/outpost-os/sentry-kernel)
+![GitHub License](https://img.shields.io/github/license/outpost-os/sentry-kernel)
+[![REUSE status](https://api.reuse.software/badge/github.com/outpost-os/sentry-kernel)](https://api.reuse.software/info/github.com/outpost-os/sentry-kernel)
+
+sentry-uapi is the user API library that delivers a full access to the [Outpost-OS](https://github.com/outpost-os) Sentry kernel interface.
+
+This crate implement the low level interface to the Sentry kernel syscalls and associated system types:
+
+* **Data types** — Sentry-uapi provides a complete set of data types and
+  values that are required in order to properly exchange information with the Sentry kernel.
+* **Sentry syscalls** — All syscall are defined, so that the kernel can be triggered easily.
+  Syscall usage can be found in this very crate documentation.
+
+This crate also support C bindings in order to allow the integration of C codebase into the
+Outpost-OS operating system.
+
+More information about the overall Sentry kernel and Outpost-OS concepts are defined in
+the [Sentry kernel general documentation](https://outpost-sentry.readthedocs.io/en/latest/).