diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c2ea3b5..60980cd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ jobs:
     if: github.event.pull_request.draft == false
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-24.04, windows-latest, macos-latest]
         python-version: [3.9, 3.12]
       fail-fast: false
     steps:
diff --git a/README.md b/README.md
index 3f7b4bd..436ca23 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,11 @@
 # harp-python
 
+> [!WARNING]
+> **This package is deprecated and will no longer receive updates.**
+>
+> Please migrate to the new `harp-data` package from [Harp Python](https://harp-tech.org/python/), which supersedes this one with an improved API and continued support.
+> A [migration guide](https://harp-tech.org/python/articles/harp-python-migration/) covers the transition.
+
 A low-level interface to data collected with the [Harp binary protocol](https://harp-tech.org/protocol/BinaryProtocol-8bit.html).
 
 ## How to install
diff --git a/pyproject.toml b/pyproject.toml
index c8fcaac..878366d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "harp-python"
 authors = [
     {name = "Goncalo Lopes", email = "g.lopes@neurogears.org"}
 ]
-description = "A low-level interface for loading binary Harp protocol data"
+description = "[DEPRECATED] Superseded by harp-data (https://harp-tech.org/python/). A low-level interface for loading binary Harp protocol data"
 readme = "README.md"
 requires-python = ">=3.9.0"
 dynamic = ["version"]
@@ -15,7 +15,7 @@ dependencies = [
 ]
 
 classifiers = [
-    "Development Status :: 4 - Beta",
+    "Development Status :: 7 - Inactive",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.9",
@@ -26,6 +26,8 @@ classifiers = [
 [project.urls]
 "Bug Tracker" = "https://github.com/harp-tech/harp-python/issues"
 "Source Code" = "https://github.com/harp-tech/harp-python"
+"Replacement" = "https://harp-tech.org/python/"
+"Migration Guide" = "https://harp-tech.org/python/articles/harp-python-migration/"
 
 [project.optional-dependencies]
 dev = [