diff --git a/README.md b/README.md
index be1d3812..9ad4d8a8 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,10 @@
+> [!WARNING]
+> Problem Builder is no longer being developed by OpenCraft.
+> It will be supported with compatibility and security fixes
+> till the Ulmo release, after which this repository will be
+> stop receiving further updates and eventually be archived.
+
+
 ## Problem Builder and Step Builder
 
 [![Circle CI](https://circleci.com/gh/open-craft/problem-builder.svg?style=svg)](https://circleci.com/gh/open-craft/problem-builder)
diff --git a/problem_builder/__init__.py b/problem_builder/__init__.py
index 6c235c59..98886d26 100644
--- a/problem_builder/__init__.py
+++ b/problem_builder/__init__.py
@@ -1 +1 @@
-__version__ = "5.2.0"
+__version__ = "5.2.1"
diff --git a/setup.py b/setup.py
index ca9dea50..f92809d2 100644
--- a/setup.py
+++ b/setup.py
@@ -167,7 +167,13 @@ def package_data(pkg, roots):
 setup(
     name='xblock-problem-builder',
     version=VERSION,
-    description='XBlock - Problem Builder',
+    description='XBlock - Problem Builder [deprecated]',
+    classifiers=[
+        "Development Status :: 7 - Inactive",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+    ],
     long_description=README,
     long_description_content_type='text/markdown',
     author='OpenCraft',