diff --git a/README.md b/README.md
index 38f601f..6d056eb 100644
--- a/README.md
+++ b/README.md
@@ -65,3 +65,10 @@ See `cleantoots config` for the current config.
 cleantoots clean  # Defaults to a dry run. Does NOT delete.
 cleantoots clean --delete  # Delete without prompt.
 ```
+
+## Tested environments
+Cleantoots has been only tested on:
+
+* macOS Catalina with Python 3.8.0.
+
+If you use it in an other environment, please tell us so we can update this list.
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 04096fb..0a7fabe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,12 +1,19 @@
 [tool.poetry]
 name = "cleantoots"
-version = "0.1.5"
+version = "0.1.6"
 description = "Cleanup your toot history."
 license = "GPL-3.0-or-later"
 authors = ["Gabriel Augendre <gabriel@augendre.info>"]
 readme = "README.md"
 homepage = "https://github.com/Crocmagnon/cleantoots/tree/master"
 keywords = ["mastodon", "toot"]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Environment :: Console",
+    "Intended Audience :: End Users/Desktop",
+    "Topic :: Communications :: Chat",
+    "Topic :: Utilities"
+]
 
 [tool.poetry.dependencies]
 python = "^3.8"